Panda USB and AutoRun Vaccine

UPDATE October 8, 2009: New version released.

The Microsoft Windows Operating Systems use the AUTORUN.INF file from removable drives in order to know which actions to perform when a new external storage device, such as a USB drive or CD/DVD, is inserted into the PC. The AUTORUN.INF file is a configuration file that is normally located in the root directory of removable media and contains, among other things, a reference to the icon that will be shown associated to the removable drive or volume, a description of its content and also the possibility to define a program which should be executed automatically when the unit is mounted.

The problem is that this feature, widely critizised by the security community, is used by malware in order to spread by infecting as soon as a new drive is inserted in a computer. The malware achieves this by copying a malicious executable in the drive and modifying the AUTORUN.INF file so that Windows opens the malicious file silently as soon as the drive is mounted. The most recent examples of this are the W32/Sality, W32/Virutas and also the W32/Conficker worm which, in addition to spreading via a vulnerability and network shares, also spreads via USB drives.

Due to the large amount of malware-related problems associated with Microsoft AutoRun we have created a free utility for our user community called Panda USB Vaccine.

Computer Vaccination

The free Panda USB Vaccine allows users to vaccinate their PCs in order to disable AutoRun completely so that no program from any USB/CD/DVD drive (regardless of whether they have been previously vaccinated or not) can auto-execute. This is a really helpful feature as there is no user friendly and easy way of completely disabling AutoRun on a Windows PC.

USB Vaccination

The free Panda USB Vaccine can be used on individual USB drives to disable its AUTORUN.INF file in order to prevent malware infections from spreading automatically. When applied on a USB drive, the vaccine permanently blocks an innocuous AUTORUN.INF file, preventing it from being read, created, deleted or modified. Once applied it effectivelly disables Windows from automatically executing any malicious file that might be stored in that particular USB drive. The drive can otherwise be used normally and files (even malware) copied to/from it, but they will be prevented from opening automatically. Panda USB Vaccine currently only works on FAT & FAT32 USB drives. Also keep in mind that USB drives that have been vaccinated cannot be reversed except with a format.


Panda USB Vaccine is a 100% free utility. We’ve tested it under Windows 2000 SP4, Windows XP SP1-SP3,  and Windows Vista SP0 and SP1. Feedback is always welcomed. Click on the download button below to start downloading.

Get it from CNET!

Command line Operation

For advanced users who wish to run Panda USB Vaccine automatically at boot to notify every time a new USB device is mounted on the system or to perform network-wide computer vaccinations via login scripts or other distribution methods, Panda USB Vaccine can be operated via command-line. Its input parameters are the following:

USBVaccine.exe [ A|B|C|Z ] [ +system|-system ] [ /resident [/hidetray] ]

[drive unit]:     Vaccinate drive unit
+system:      Computer vaccination
-system:        Remove computer vaccination
/resident:      Start program hidden and prompt for vaccinating every new drive
/hidetray:      Hides tray icon when used with the /resident command

To vaccinate USB drives F: and G:, use
USBVaccine.exe F G

To vaccinate the computer, use
USBVaccine.exe +system

To vaccinate computer and prompt for vaccinating every new drive without showing a tray icon, use
USBVaccine.exe /resident /hidetray +system

It could be very useful to create a Shortcut in the Startup folder to USBVaccine.exe with this last command line (or without the /hidetray) to make sure that every time you boot the computer USBVaccine gets loaded by the system and it vaccinates the computer and prompts the user for vaccinating any new non-vaccinated USB drive. However if you do this under Vista, UAC will block it from running at Startup as it requires admin priviledges. We’ll fix this in future versions.

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249 Responses

Leave a Reply
  1. Pedro Bustamante
    Mar 06, 2009 - 01:58 AM

    Does this require installation or is it a standalone app? Can the computer autorun vaccination be reversed?

  2. Pedro Bustamante
    Mar 06, 2009 - 04:19 AM

    good tool, hope to see this feature as a part of 2010 version of panda.

  3. Pedro Bustamante
    Mar 06, 2009 - 09:41 AM

    Does not require installatio bob, it’s a standalone app. We’re evaluating however doing an installer in order to give the option to start automatically at boot and remain resident at the traybar, watching for every new USB and prompting for vaccination. What would you think about this?

  4. Pedro Bustamante
    Mar 06, 2009 - 11:03 AM

    Why CAN’T it be used in NTFS form of hard disk?

  5. Pedro Bustamante
    Mar 06, 2009 - 11:13 AM

    We do have an internal version with NTFS support and will release this as soon as its ready. Check back here and I’ll make it available for download when its ready.

  6. Pedro Bustamante
    Mar 06, 2009 - 03:28 PM

    Thanks for the reply. Perhaps an installer with the option to run as a standalone or as an auto start.
    One other question, you mention the USB drive is permanently changed. What about the PC itself?

  7. Pedro Bustamante
    Mar 06, 2009 - 04:58 PM

    Will take your suggestion into consideration bob. Regarding Computer Vaccination (PC itself) it can be reversed without a problem. Once vaccinated the “vaccinate computer” button will be changed to “remove vaccionation” so you can enable Autorun again.

  8. Luis
    Mar 06, 2009 - 11:14 PM

    I expect Microsoft ships Windows 7 with autorun/play disable by default.

  9. Pedro Bustamante
    Mar 07, 2009 - 01:12 PM

    It is possible – mark vaccinated autorun.inf “hidden”?

  10. Alex Molina
    Mar 07, 2009 - 03:58 PM

    Hi! I have only a short question: why doesn't Panda and its own products collaborate with the Virus Bulletin tests? I think it would be a very useful second opinion to the users.

    Please, also read this:


    Thanks and sorry for my bad English!

  11. Pedro Bustamante
    Mar 07, 2009 - 06:43 PM

    What is done to the USB drive itself that prevents this from being reversed? Even a format won’t reverse it?

  12. Pedro Bustamante
    Mar 07, 2009 - 07:57 PM

    Sorry Andrew I don't understand your question.

    Alex, there are a variety of reasons why we don't participate in VB tests. From our perspective in order to give a good judgement of a product's ability to protect users you need to evaluate it as a whole, not only parts of it. Modern anti-malware products incorporate many protection technologies but some people like you seem to think that AV is stuck since 15 years ago where there were only static signatures. There are other independent tests which we do participate in for many many years:

    * ICSA (USA)
    * West Coast CheckMark (UK)
    * (Germany)
    * PCSecurityLabs (China)

    Tonydi, a format will of course disable the vaccination of Panda USB Vaccine.

  13. Pedro Bustamante
    Mar 07, 2009 - 09:05 PM

    Step 1. Start Notepad or another text editor.

    Step 2. Copy the following text from this page and paste it into your text editor (everything between the square brackets should be all on one line):


    [HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionIniFileMappingAutorun.inf]


    Step 3. Save the file with a name like NoAutoRun.reg, taking care to include the .reg extension.

    Step 4. Right-click your .reg file and choose Merge. Confirm any warning prompts to add the information to the Registry.

  14. Pedro Bustamante
    Mar 08, 2009 - 01:53 AM

    “Tonydi, a format will of course disable the vaccination of Panda USB Vaccine.”

    Ok, perhaps you should re-word that section. It makes it sound like you modify the drive in a way that’s completely irreversible. Perhaps something like…

    “Also keep in mind that USB drives that have been vaccinated cannot be reversed without reformatting the drive.”

  15. jim
    Mar 08, 2009 - 03:35 AM

    Microsoft has a “fix this problem” to disable autorun on usb drives. check it out here>

  16. Pedro Bustamante
    Mar 08, 2009 - 04:19 AM

    hey guys the past comment works on NTFS!

    I have a Win XP SP2 NTFS machine and i did that and it worked!!!

  17. Henri willox
    Mar 08, 2009 - 06:35 AM

    Very nice tool !!

    Greetings from Africa :o)

  18. Pedro Bustamante
    Mar 08, 2009 - 02:16 PM

    Solaris, your procedure is exactly right for "Computer Vaccination" so that Windows will not know how to parse autorun.inf files. There's a variety of utils out there that do the same. However that's not enough for vaccinating individual USB drives.

    Tonydi, you're right. I'll reword it.

    Jim, thanks for the link. However Panda USB Vaccine uses a much different, safer, technique by modifying the USB drive itself. Also the article you mention only works on 2000/XP/2003.

    Xavier, "Computer Vaccination" works on NTFS. It is only "USB Drive Vaccination" that works on FAT/FAT32 currently. However keep in mind that the vast mayority of USB drives come preformatted in FAT/FAT32 anyway.

  19. Pedro Bustamante
    Mar 09, 2009 - 10:21 AM

    Is it safe to use it with mp3 players? I mean, do these normally players work after that?

  20. Pedro Bustamante
    Mar 09, 2009 - 11:45 AM

    ichmbch, it should work on MP3 players as well as it’s also a flash device.

  21. Pedro Bustamante
    Mar 09, 2009 - 12:58 PM


  22. Pedro Bustamante
    Mar 09, 2009 - 04:28 PM

    I was hit with conficker and Panda caught/cleaned it but on re-start, Windows would not load (Vista Business SP1). I could not run repair and had no restore point so I ended up rebuilding. Once done, and Panda re-installed, again it flagged a file as conficker, removed it and then I was unable to start Windows again w/o returning to a newly created restore point. Since then, I have not installed Panda but AVG and have had no issues. Is this something expected and has Panda upgraded/updated to prevent this from happening?


  23. Pedro Bustamante
    Mar 09, 2009 - 06:22 PM

    THANKS – This virus is a VERY common for shared computers.

    How exactly does this modify the USB drive?

    Presently I am using Flash Disinfector –
    to clean virus/trojans and then Immunize both the PC & USB drives on shared computers. After it cleans it writes a locked AUTORUN.INF folder/file to the root of all the HDs & USB drives to Immunize them from future infections.

    Is your program compatible with the above and can it be run after Flash Disinfector has been run?
    Will it vaccinate the USB drives using a different compatible method for for added protection?

    From my experience you *DEFINITELY* need the capability of resident protection in your program as well to guard against new infections from new infected USB drives. Hope you add that as well.
    I currently install Autorun Eater v2.3 for resident protection
    but it is not perfect and sometimes allows the virus to write files to the PC.


  24. Pedro Bustamante
    Mar 09, 2009 - 07:19 PM

    It’s Work really and very useful for USB storage Device but may occurs problem for Dial up Device.
    Technical Manager (IT)
    Combine Military Hospital

  25. http://
    Mar 10, 2009 - 08:31 AM

    it sucks!!

  26. Pedro Bustamante
    Mar 10, 2009 - 01:09 PM

    why not use a simple bat file which can delete autorun.inf from all drives

  27. http://
    Mar 10, 2009 - 03:21 PM

    Kharmin, you might be experiencing a different problem. I'll have our support people contact you. Otherwise please get in touch with them and let me know if it's been fixed.

    Mahtab, can you give more details on the model of the device so we can check this out. Thanks for the comment.

    uv.kid, a bat file will not do the trick as the moment you insert the drive into your PC autorun will execute whatever program it is told to. You could manually delete the autorun.inf from each of your drives but it could be re-infected when you insert it into another PC. The safest way is to disable its autorun.inf capabilities all together.

  28. Pedro Bustamante
    Mar 10, 2009 - 09:57 PM


    How to uninstall in one drive, as for example “I” ???


  29. Bharat Balegere
    Mar 11, 2009 - 12:10 PM

    How exactly does Panda USB Vaccinator work?
    What changes does it perform on the USB drive?
    How does it perform the changes?
    Also can you please add functionality to prevent access to files other than autorun.inf?

  30. Pedro Bustamante
    Mar 11, 2009 - 02:08 PM

    there is a similar product which is lighter and can support NTFS. Check it out .

  31. Pedro Bustamante
    Mar 11, 2009 - 03:09 PM


    I have a question.

    Is an autorun.inf created in pen drive after it´s vaccineted ?

    Thanks from Brasil.

  32. Pedro Bustamante
    Mar 11, 2009 - 07:58 PM

    How to remove the vaccine from a usb drive?

    A new autorun.inf will be created, changing the previous usb drive's autorun.inf.

    When opening the new autorun.inf, an error message says "Access denied".

    Will i have to format my usb drive to remove it?

    Is there a more practical solution to do this?

  33. Pedro Bustamante
    Mar 12, 2009 - 12:27 AM

    CkY & Davide, in order to uninstall a vaccinated USB drive you need to (1) backup the data on the USB drive and (2) format the USB drive.

    Bharat, thanks for your feedback, we’ll take it into consideration for next versions. But in order to prevent potential abuse by malware authors of the technique we use in the USB Vaccine, we will not release this information yet.

    Paulo, yes a special autorun.inf that cannot be read, modified or deleted is created on the USB drive when vaccinating it.

  34. Pedro Bustamante
    Mar 12, 2009 - 10:15 AM

    Hi Guys!

    Could you explain "how-it-works" how non resident software could prevent read "autorun" files?

  35. Pedro Bustamante
    Mar 13, 2009 - 03:14 PM

    Hello Davide!

    Very interesting tool, Except it creates an autorunf.inf on the USB drive…which is not good for large use.

    In a firm, When you have vaccinated drives, how do you recognised a vaccined drive from a drive containing a virus?

    I'd recommend it if you file created on the usb drive was immune.inf or Anti-autorun.INF instead of autorun.inf, but that is NOT the case!

    Also, make the tool work on NTFS pleaase!

    Please HELP all community by doing this!

  36. Pedro Bustamante
    Mar 13, 2009 - 03:20 PM

    Also, what is the difference between Panda autorun Vaccine and Flash desinfector??

    Flash desinfector has been out since ages, but has never improve by putting another file than autorun.inf on the drives.

    We, users and IT technical service would like a shield "around" our usb key, and not a kind of "none" infected autorun that stops infected autorun to put themselves on the drive.

    Everyone would be grateful if someone had a true solution.

  37. Pedro Bustamante
    Mar 13, 2009 - 08:42 PM

    once used on my usb key, the soft Rav.exe ( say me : “your usb key is infected” this is a positive false ? Rav is not fiable ?

    do u have an idea ?

  38. Pedro Bustamante
    Mar 14, 2009 - 12:46 AM

    hhhu…sorry… (update)

    once my usb bye immunized by Panda USB and AutoRun Vaccine rav.exe say me… etc etc…

  39. Pedro Bustamante
    Mar 14, 2009 - 01:00 AM

    Sounds good, but how do I vaccinate my USB-stick *before* I plug it into a Windows computer? I’m currently on a Mac at home, so I tried downloading the Vaccine directly to the stick, and while it was possible to unzip it, it wasn’t possible to run it. I’ve heard of something called Wine – would that work or do I have to actually plug in my stick to a Windows machine before I can vaccinate it (and thus risk infection, of course)?

  40. Pedro Bustamante
    Mar 14, 2009 - 01:03 AM

    Oops, forgot to enable Java. At the risk of repeating myself:
    Sounds good, but how do I vaccinate my USB-stick *before* I plug it into a Windows computer? I’m currently on a Mac at home, so I tried downloading the Vaccine directly to the stick, and while it was possible to unzip it, it wasn’t possible to run it. I’ve heard of something called Wine – would that work or do I have to actually plug in my stick to a Windows machine before I can vaccinate it (and thus risk infection, of course)?

  41. Pedro Bustamante
    Mar 14, 2009 - 02:22 PM

    This is a good tool. And I suggest that may can release .msi file for deploy in Windows AD environment.

  42. Pedro Bustamante
    Mar 14, 2009 - 05:09 PM


    Could you explain “how-it-works” how non resident software could prevent read “autorun” files?
    –> Good question !
    –> Any idea ?


  43. Pedro Bustamante
    Mar 14, 2009 - 05:11 PM

    @Paulo Ravaiano
    Just use Linux to remove the autorun.inf 🙂

  44. Pedro Bustamante
    Mar 14, 2009 - 05:29 PM

    How does the USB Vaccine works? How is it different compare to Autorun Protector?

  45. Pedro Bustamante
    Mar 15, 2009 - 12:23 AM

    Sorry! I made a mistake with the user’s comments.

    @Paulo Ravaino
    An unreadable and unwriteable autorun.inf file is created in your USB drive when you vaccinate it.

    You can use Linux to remove the autorun.inf.

    I think Rav.exe detected your USB drive as infected because there’s an autorun.inf file in it. Just to be sure, you should perform a scan in your USB drive.

  46. Pedro Bustamante
    Mar 15, 2009 - 03:09 AM

    Can I suggest another commandline parameter to hide the prompt for vaccination so drives are always vaccinated please. example :
    USBVaccine.exe /resident /hidetray /noprompt

  47. Pedro Bustamante
    Mar 15, 2009 - 05:31 AM

    is quite easy to understand as they do it… change it permissions using Linux. Any person that does malware will understand this quite easily… just google around and they are back in business 🙁 Vaccinate your computer is really the best way to prevent! AutoRun.inf created using this tool will certainly help you protecting from some virus… but from future version I think it will not be able to.

  48. Pedro Bustamante
    Mar 15, 2009 - 10:52 AM


    I know LINUX is able to remove the autorun.inf…

    But, I’m not sure if the file is “corrupted” or if it’s related with FAT system ?

  49. Pedro Bustamante
    Mar 15, 2009 - 02:46 PM Beta does not vaccinate USB drive if a folder named AUTORUN.INF already exists, for example created with the following command line:


    The AUTORUN.INF folder has to be deleted before.

  50. http://
    Mar 15, 2009 - 03:59 PM

    Thank you very much PandaUSB and AutoRun Vaccine.

  51. Pedro Bustamante
    Mar 15, 2009 - 07:44 PM


    Before vaccinating my USB drive, I created an +S(ystem) +H(idden) +R(ead-only) file named autorun.inf on it. When I vaccinated it, the autorun.inf content has been kept, but its attributes has been cleaned:

    G:> attrib
    A G:file1.txt
    A G:file2.txt

    and its owner has been changed[*]:

    G:> dir /Q
    DD/MM/AAAA HH:MM XX Everyone file1.txt
    DD/MM/AAAA HH:MM XX Everyone file2.txt

    Any idea?

    *The FAT architecture doesn’t support Access Control Lists.

  52. Pedro Bustamante
    Mar 15, 2009 - 10:14 PM


    Many thanks for the feedback and suggestions received so far. Please let us know if there are any more features you’d like to see in future versions of Panda USB Vaccine. So far we have:

    1- Support for vaccinating NTFS USB drives.
    2- Installer to keep resident in traybar.
    3- .MSI package for integration into AD.
    4- /noprompt or “automatically vaccinate new USB drives” option.

    Any more?

  53. Pedro Bustamante
    Mar 16, 2009 - 10:02 AM

    Thank you for this tool, its very simple yet effective.

  54. http://
    Mar 16, 2009 - 11:54 AM

    very good

    thank you

  55. Pedro Bustamante
    Mar 16, 2009 - 01:57 PM

    Quote :
    “An unreadable and unwriteable autorun.inf file is created in your USB drive when you vaccinate it.”

    That’s what I wanted to know.
    Thanks a lot for a most valuable initiative and carrying out.

  56. killer22
    Mar 17, 2009 - 03:58 AM

    I cannot clear the file autorun.inf of my pendrive. I select the option to eliminate but it does not allow it to me. that I can do?

  57. Pedro Bustamante
    Mar 17, 2009 - 08:57 AM

    Still no reply for this:

    Very interesting tool, Except it creates an autorunf.inf on the USB drive…which is not good for large use:
    In a firm, You cannot distinguish a vaccinated drive from an INFECTED drive!!!
    For the moment, in order to stop virus spreading, my firm has stopped any autorun.inf to be created on any pc via GPO…But in may cause pb with some autorun on cd and some installations.

  58. Bharat Balegere
    Mar 17, 2009 - 11:19 AM

    Please add this functionality.
    Ability to prevent access to files other than autorun.inf

  59. Pedro Bustamante
    Mar 17, 2009 - 11:56 AM

    Well my usb pen is not shown maybe it does not work without admin rights? If I use the command line options to vacine the drive I get a blue screen.

  60. Pedro Bustamante
    Mar 17, 2009 - 01:28 PM

    Seems i’ve sucked this. 🙁

    After vaccination my Sandisk Cruzer Contour doesn’t work anymore: the window i must enter the password isn’t appear, so i can’t unhide the main partition contains all data and the complete U3 system with lots of applications installed.

    On the official download page ( Panda don’t mention that the the process is not reversible on USB sticks and the much more important information is hidden well behind the question mark on the bottom of the GUI: “…under some very unlikely conditions some applications could stop working.”

    I think it is a real shame! You *must* provide this information on the public download page with big, bold, red characters!! If i would knew this… 🙁

    Any other solution? BTW the visible partition is a CDFS one, so theoretically this application can’t do the job on it as we know: “…currently only works on FAT & FAT32 USB drives.”. But what happens then on this CDFS partition!?

  61. Pedro Bustamante
    Mar 17, 2009 - 06:21 PM

    you cannot delete the autorun.inf file because the USB drive is vaccinated. If you want to keep it vaccinated you should not try to delete it. If you want to reverse vaccination, backup the data in the drive and then format the USB drive.

    I don’t think I understand correctly what you mean. If you disabled autorun.inf files in all workstations via GPO, can you use Panda USB Vaccine on USB drives or not?

    @Bharat Balegere,
    This is an interesting idea, thank you. However I think it is more oriented to a different type of tool. Maybe a separate tool for preventing certain plugins, dll’s, etc for specific programs?

    @Paulo, @Kiraly
    Please send me more details of your PC/USB and how you’re using Panda USB Vaccine to

  62. killer22
    Mar 18, 2009 - 03:36 AM

    thanks for the information

  63. Pedro Bustamante
    Mar 18, 2009 - 03:39 AM

    hablo español pero me las ingenie para comentar en ingles…

    ..esa es una opcion para una nueva vercion de este producto. el echo es que se pueda eliminar el archivo .inf con alguna opcion del programa..

  64. Pedro Bustamante
    Mar 18, 2009 - 01:29 PM

    Good news! After trying the mentioned pendrive on another (never vaccinated) computer and found it works, i’ve unvaccinated the 1st machine and now the Cruzer is working nearly proprely on it too. The only strange side effect of this process is that now the pendrive runs automatically, although i’ve blocked tha autorun function for all drives by Microsoft Powertoys TweakUI. In this little app i see that autorun is still disabled, but practically it is not!

    I’ve made another run with this combination (for recheck) and the events was the same. When vaccinated the machine: the Cruzer doesn’t work. When unvaccinated the *machine*: the Cruzer works again.

    So the situation is not that really bad, but i can’t use this Panda freeware till i want to use my Cruzer.

  65. Pedro Bustamante
    Mar 18, 2009 - 07:32 PM

    Russia Thank you too.
    Nice tool!

  66. Bharat Balegere
    Mar 19, 2009 - 04:40 PM

    A different type of tool ,maybe a command line tool to prevent access to files other than autorun.inf on FAT32 Filesystem.

  67. Pedro Bustamante
    Mar 20, 2009 - 06:56 AM

    i think developers were in a greate hurry when relesed this product without UNvaccination
    dont use this program before read all posts above

    i’ve used it, now formatting my USBdevice =)

    P.S.: very good idea of product – i will use when it will have “UNVaccine USB Drive” and if it will allow keep attributes (as hidden) after vaccine

  68. Pedro Bustamante
    Mar 21, 2009 - 11:29 AM

    When USBVacine is run in resident mode it needs to click [yes] in dialog window to close the application before the comuter may shut down. This is _very_ inconvenient.

  69. Pedro Bustamante
    Mar 22, 2009 - 03:20 AM

    Muito bom, baixei, instalei e ja estou usando. Vacinei meu pc e existe a opção de desativar a vacina a qualquer momento e ja no pendrive para desativar só formatando-o.

  70. Pedro Bustamante
    Mar 22, 2009 - 01:14 PM

    did panda usb vaccine dont need to update?

  71. Pedro Bustamante
    Mar 23, 2009 - 04:21 AM

    How does it make the autorun.inf file unreadable & unmodifiable? I couldn’t open to view the contents.

  72. Pedro Bustamante
    Mar 23, 2009 - 05:57 PM

    I was hit by chiKie.exe and it is really messing up my system. I don’t even know where to start to fix this thing. I would reformat the drive but I am a missionary and out of the country for a while. The only thing I was able to do was quarantine the folder chiCkie.exe.

    I downloaded the vaccine but it won’t work on either the computer or the usb drives. Any suggestions??

    Please help. This is driving me crazy… Thanks

  73. Pedro Bustamante
    Mar 24, 2009 - 04:03 AM

    Hi my name is Iwan, I have been download your panda usb and autorun vaccine.

    I can use it to vaccine my computer, but why it doesn’t work with my 2 usb flashdisk?
    So, how I can use this panda to vaccine my usb flashdisk?

    reply me soonly



  74. Pedro Bustamante
    Mar 24, 2009 - 02:47 PM

    If i already use Panda Antivirus, USB vaccine is unusable for me?

  75. Lorenzo Jiménez
    Mar 24, 2009 - 04:56 PM

    gracias por facilitar lainstalacion del antivirus

  76. Omar Dalatieh
    Mar 24, 2009 - 08:35 PM

    This is a killer app, I’d say.

  77. Pedro Bustamante
    Mar 25, 2009 - 02:12 AM

    Lol, i just plug my usb drive at an internet cafe near my house, and the computer repeatedly tell me that he cant write autorun.inf in my usb drive. Thank you so much for this usefull tool, finally i can forget about getting a virus from my usb drive.

    THANK YOU!!!

  78. Pedro Bustamante
    Mar 27, 2009 - 01:50 PM

    Hello Pedro. Thank you very much for this wonderful little tool.

    I have Vista (Greek) with SP1. When I run USBVaccine I protected my machine (worked fine) but I could’t protect the usb drives (FAT formated). It gave me and error message. So I went to another machine (XP) and tried again. It work fine and vaccined the USB drives. I even tried to delete autorun.inf and I couldn’t.

    Then I came back to my Vista pc and rerun the prog, and it correctly shown that the usb drive was vaccinized. When I tried to delete ANY file that was in my usb drive (photo,docs, etc) I COULDN’T !!!!

    I tried different usb drives (not vaccinized at all) and I couldn’t delete any file either !!!!
    So I imagine that something changed to the pc and has nothing to do with the usb drives.
    I tried to delete my files from my usb drives from other pc and it works fine !!!

    I can upload screenshots or videos if you want. Your advice is more than appreciated.
    Please help !!!


    p.s : I also send you an email.

  79. Pedro Bustamante
    Mar 27, 2009 - 03:49 PM

    I was trying to vaccinate my USB and I couldn’t immediatly show a legend “vaccination was no posssible”
    Please Help

  80. Pedro Bustamante
    Mar 28, 2009 - 11:19 AM

    I have great problem after using this tool on a laptop, while a cd with autorun of Linksys, for installation wireless adapter is denied to startup his setup.exe Please, help me!

  81. Pedro Bustamante
    Mar 28, 2009 - 11:42 AM

    Just I have reset a diskimage with Acronis for return to an older situation while this tool works more hardly as needy 😉

  82. maniack
    Apr 01, 2009 - 07:46 AM

    crap, how do i change my thumb drive icon..

  83. Manish sharma
    Apr 02, 2009 - 12:04 PM

    how to use panda usb and delete virus.

  84. Luca
    Apr 03, 2009 - 11:37 AM

    plz make downloadable a versione with ntfs support !!! it’s not possible the support only for obsolete fat32 drivers !!

  85. http://
    Apr 04, 2009 - 05:49 PM

    Hello….this is an awsome software from Panda….
    I’m using it personally…& i must say this is the best solution for pc & USB drive to be firewalled from autorun programs like trojan horse/adware etc.
    it is very effective…
    ….& for those who have questioned so many unnecessary things….my answer is-“Just dont blame the product…blame yourself…for not knowing a little bit about computer….

    Thanks again to PANDA!!!

  86. http://
    Apr 05, 2009 - 04:23 AM

    After USB-vaccine USB-drives work incorrect.

  87. http://
    Apr 05, 2009 - 01:09 PM

    I have used your sw to vaccinate a USB pen drive. Well, I want to see the new autorun.inf but Windows does not permits me.
    Then I could see the content of the file, using Linux. Well, after that, I used the pen drive in a laptop under Windows XP.

    I don’t know if it was because of the use under Linux, or because of the use in the laptop, but then I could read and write the autorun.inf (it has something like this: caacaaacaaa). I had vaccinate the pen-drive again.

    There was not any virus in the pen-drive. This is very strange!

  88. http://
    Apr 05, 2009 - 01:50 PM

    Very NICE Tool,.,

    My AutoRun Virus are gone!!!

    Thnx a lot!!!

  89. http://
    Apr 05, 2009 - 05:52 PM

    This autorun vaccine is cool!

  90. http://
    Apr 06, 2009 - 01:08 AM

    Hi! A great program concept!

    Just a suggestion!

    If possible a resident scanner to delete autorun.inf previously infected and also to autoimmune option after the cleaning! then it’ll be great!


  91. http://
    Apr 07, 2009 - 11:39 AM

    Hi – I have found this software very usefull – when is the next version out the will work with removeble hard drives etc ?

  92. http://
    Apr 08, 2009 - 09:07 PM

    USB Vaccine won’t inoculate my USB pendrive if iKill is on, which always is the case in my desktop PC. I haven’t tried yet, but the autorun.inf that USB Vaccine created will most likely get decimated as soon as a “vaccinated” pendrive is inserted into any iKill-guarded system. Just a heads-up.

  93. http://
    Apr 09, 2009 - 01:20 AM

    very wel mondongo que chimba de penco

    se les agradece ala proxima que sea en spanishs

    i love you tu morro

  94. http://
    Apr 09, 2009 - 04:45 AM

    please tell me how to update,

  95. http://
    Apr 12, 2009 - 06:19 PM

    I have a virus , your vaccinne doesnt work

  96. http://
    Apr 12, 2009 - 07:44 PM

    I want Vaccinate my Philips GoGearAudio, but not is possible!

    Says: Vaccination was not possible


    How can I do?

    Is compatible with Avast Home Edition?

  97. http://
    Apr 14, 2009 - 09:32 AM

    but how the hell can I uninstall it from F usb drive – am I stuck with it for ever unless I reformat the c drive?

  98. http://
    Apr 16, 2009 - 06:27 AM

    You could create the list of the most widespread virus files? Or the connected module for loading of the list of files ???????.

    Example viruses:

    Autoexec.bat autorun.bat autorun.bin autorun.exe AUTORUN.FCB Autorun.ico AUTORUN.INF comment.htt copy.exe DA.exe desktop.ini folder.htt fun.xls.exe host.exe svhost.exe toy.exe winfile.exe index.dat Recycled RECYCLER "System Volume Information" temp

    and attributes – "Hidden"


  99. http://
    Apr 17, 2009 - 10:26 AM

    It doesnt read my memory card or ipod

  100. http://
    Apr 21, 2009 - 07:51 AM

    Panda USB is a fantastic tool for cleaning USB drives. However I find it doesn’t work on large USB drives – 16 GB. After starting the vaccination, the program stops responding. Is there a remedy?

  101. Jon
    Apr 21, 2009 - 09:25 AM


    Need help urgently!!! Computer cannot shutdown after using Panda USB Vaccine. Everytime need to click on END PROGRAM for Panda USB Vaccine then only can shutdown computer. Please help.

    Thank you.

  102. http://
    Apr 21, 2009 - 10:32 AM

    I ahve the same question that other user has.

    “It is possible – mark vaccinated autorun.inf “hidden”?”

  103. http://
    Apr 22, 2009 - 03:29 AM


  104. http://
    Apr 22, 2009 - 05:35 PM

    exelent app

  105. http://
    Apr 24, 2009 - 10:15 AM

    Hi I Have an application exe that i still want 2 autorun even if i install panda USB Vaccine. How Can I Do this?

  106. http://
    Apr 25, 2009 - 12:48 PM

    One thing that I noticed which possibly can be improved, is that on one WinXP laptop that I put this on, when I tell the computer to Shut Down it hangs up because a popup appears asking if I really want to close the program (because it is in resident mode), then Windows waits for 30 seconds and just prompts me to End Program or not and does not automatically close as part of the Shut Down sequence. Just a little thing that would be great to improve so I can say “ShutDown” and walk away.

    But — the program is a genius one otherwise and I am glad you came up with it! I am still using it and telling others to use it because it has already slowed down viruses here! Thanks.

  107. Technology
    Apr 26, 2009 - 05:08 AM

    Can we use this software both on USB Drive as well as PC?
    Can we install in Memory Cards (Mobile memory chips)

  108. http://
    Apr 27, 2009 - 04:01 AM

    this suck…useless software….

  109. http://
    Apr 27, 2009 - 01:10 PM


    request for exFAT and NTFS, Tq

  110. CANDIDO
    Apr 28, 2009 - 08:32 PM


  111. Iqbal
    Apr 30, 2009 - 02:57 PM

    I don’t think that it is useful software or i do not operative is better.

  112. http://
    May 02, 2009 - 12:23 PM

    this is a useless product if your pc is infected (with bv:autorun TDS Worm)

  113. http://
    May 05, 2009 - 03:04 AM

    i already been vaccinate my pen drive, and into my pen drive also have the file call autorun.inf, if let say, i want to remove the file how can i do?
    Please advise. thanks

  114. Pedro Bustamante
    May 09, 2009 - 01:46 PM

    How to remove vaccination from usb…
    Open your USB drive using winhex disk tool…
    When you open it winhex detect an error at offset xxxxx. Go at this offset and you’ll see AUTORUN INF@
    Edit the @ (40h) and replace with 20h (space).
    Enjoy…you must delete autorun.inf

  115. http://
    May 10, 2009 - 09:17 PM

    Thak you. The tools works Fine.. 🙂

  116. Damen
    May 13, 2009 - 05:29 PM

    what happens if I use your software to vaccinate a NTFS USB drive?

  117. http://
    May 14, 2009 - 12:29 AM

    @all, many thanks for all your feedback. Even though I haven’t been answering each and every suggestion, rest assure we’ve taken then into consideration and will probably release a new version soon with many of your requests incorporated.

    Again thanks for using USBVaccine and for all the valuable feedback.

  118. http://
    May 18, 2009 - 05:40 AM

    i have a usb drive that contain those AutoRun virus..if my laptop is vacinated with this software, can i still use my virus-affected usb drive with it without affected by the virus?

  119. Patricio Caniulef
    May 20, 2009 - 01:23 AM

    A friend of mine has one of this USB virus in his mp3 player. i’ve tried to vaccine it with the program but it said that there was a problem, blocked or something, can’t remember right now.
    How can i fix that without formating the USB? it hashis tessis there

    TVM for the app btw

  120. Joao
    May 20, 2009 - 03:17 AM

    Anyone that makes a error and Vaccine some USB that wasn’t supposed to be vaccine? You want some other autorun.inf file their, but don’t want to format USB key?

    No problem! Burn a CD with Ubunto 9.04, restart your Windows computer and boot from the cd (before windows start) in “live mode, without installation” when desktop finally appears insert the USB key (an icon will appear in the desktop), see the contents and delete the autorun.inf created by Panda USB Vaccine (if problems arrive, see the properties > permission, and change for read & write, save and try to delete again). You are done!

  121. anio
    May 20, 2009 - 08:05 PM

    espero que sea bueno este anti virus

  122. http://
    May 21, 2009 - 03:05 PM

    hi, thanks for this app, it´s awesome, i have a litle problem with mi usb but with this vaccine i solved all very very very thanks for save mi life and mi pc

  123. http://
    May 22, 2009 - 12:46 AM

    hi, mmm.. is posible delete the autorun blocked by panda usb vaccine?

  124. Pedro Bustamante
    May 26, 2009 - 12:11 AM


    Yeah, just run again Panda USB Vaccine tool, select your drive and click in remove vaccine.

  125. http://
    May 27, 2009 - 03:41 PM

    The trick with your tool doesn’t work if the USB flash is inserted into a Linux machine. The files are somehow given the default priveleges after being unmounted and inserted back into a Windoze one. Unfortunately. You should have a look at this.

  126. http://
    May 27, 2009 - 09:08 PM

    It seems as you “simply” change the Attributes field to 0x40 for the autorun.inf file in the Root Directory. A virus with admin privileges can easily undo that (just no one does as of now, because the tool is still too unknown). I tried it with tiny hexer and could write to the file again.

    Yes it should be possible to just mark the file hidden+system. (use 0x46 instead of 0x40 for the attributes). Changing the filename (at least in Explorer) should work too, just create a long filename like AUTORUNDISABLED.INFORMATION (where the short name starts with the long name for both filename and extension) and then tweak the AUTORU~1.INF entry in the Root Directory to read AUTORUN.INF (you will have to adjust the checksum in all the LFN entries from 0x96 to 0xE0 to do this).

    I tried all this with a disk editor, and the result was an autorundisabled file which was hidden and inaccessible, but which was still found when explicitly searching for AUTORUN.INF and which prevented me from creating another AUTORUN.INF for that same reason.

    So, a tool which checks for AUTORUN.INF will still find this file, but a tool which reads through the directory list (like Explorer) will only find the autorundisabled file.

    [No, I won’t make a unvaccine tool available, those who understand how FAT32 works (or can find the spec on can undo it with a disk editor if they like and the others should reformat it. Hopefully, virus authors don’t know how FAT32 works…]

  127. Pedro Bustamante
    May 28, 2009 - 08:42 AM

    @Pedro Bustamante:
    Thanks for useful program!
    I think its a good idea to add ability (option) of vaccination flashdrives by creating files like “RECYCLER”, “RECYCLED”, “autorun.exe” etc. or even any custom name (point of controversy)

  128. http://
    May 28, 2009 - 12:45 PM

    I bought a new Usb pendrive 16 Gb and used this Panda USB Vacine.
    Then, my PenDrive has died, and i could not even format it.
    Did it happen because of a hardware problem or because of this software was the cause of the problem?
    Because i am getting a new one, of the same model, and now I want to know if there is a risk to use it.

  129. Pedro Bustamante
    May 28, 2009 - 05:05 PM

    To all,

    we’ll release the final version of USBVaccine soon. Please stay tuned.

    @Jhon, this is probably a hardware issue, cannot be related to USBVaccine.

  130. http://
    May 29, 2009 - 02:49 AM

    Well, it seems to be a great software and all…but it didn’t work on my USB. It says “Vaccination was not possible”. Is there a particular reason for this?? All I know is that the autorun.inf virus (and system.exe that goes with it) is extremely dirable/resilient/annoying as ****. No matter what method I use I haven’t been able to remove it!

    That said I have not used Linux as I do not know how to use it. Any advice anyone??

  131. http://
    May 30, 2009 - 04:51 PM

    Hi, i’ve been using usbvaccine and its been great! I just have a concern.. i’ve vaccinated a number of usb(s) of mine but sometimes when i let people borrow it and plug it into their computer it detects a virus? i’m very sure my computer is virus because of my personal habit of the best antivirus/antimalware etc protection for my own pc.. so i’m guessing its a false positive on the part of the antivirus of their computer?

  132. http://
    Jun 01, 2009 - 10:28 AM

    I’m on my work PC,it doesn’t see my USB ,which is Fat 32.What do do?

  133. Pedro Bustamante
    Jun 01, 2009 - 11:19 AM

    @Tokidoki18, try backing up your data and then re-formating the USB stick. Are you then able to vaccinate it?

    @Reinwald, Panda USBVaccine only creates a AUTORUN.INF file which cannot be opened/modified/deleted from Windows. Other infected computers can still copy infected .EXE files to the USB stick, USBVaccine simply prevents the infected EXE from executing automatically.

  134. Pedro Bustamante
    Jun 01, 2009 - 12:48 PM

    Ok thanks! I’m pretty sure I wasn’t the cause of the virus!

    Btw when will the final version be release? hehe

  135. Sudeep
    Jun 02, 2009 - 05:24 AM

    Great Tool, thank you.

  136. Pedro Bustamante
    Jun 02, 2009 - 06:09 AM

    not support USB NTFS

  137. Pedro Bustamante
    Jun 02, 2009 - 07:59 PM

    Parabéns e obrigado pela vacina, mas como tenho alguns pen drives formatados em NTFS gostaria de saber se existe alguma previsão para a versão que vai vaciná-los.

  138. Anish K.S
    Jun 04, 2009 - 08:09 AM

    Thanks panda for this free tool

  139. Jc Rincon
    Jun 05, 2009 - 04:35 PM

    “…Also keep in mind that USB drives that have been vaccinated cannot be reversed except with a format.” … it´s not true. Delete is possible within Win98.

  140. Pedro Bustamante
    Jun 06, 2009 - 11:20 AM

    Thanks Panda Company ^.^

  141. Pedro Bustamante
    Jun 08, 2009 - 02:44 AM

    Sin lugar a equivocarme, Esta versión "PANDA AVPRO2009", funciona al 100%.

    Gracias Srs. PANDA

    IUTOX.BAT 'Variantes "W32/Lineage.KMT

    A63GROX.COM 'variante "Trj/Downloader.MDW"


    Cierto Trinidad, Rusel

    +5162-962-909-XXX [censored]

  142. Pedro Bustamante
    Jun 09, 2009 - 03:40 AM

    “…Also keep in mind that USB drives that have been vaccinated cannot be reversed except with a format.” … it´s not true. Delete is possible within Linux (Knoppix on CD).

  143. tonob23
    Jun 10, 2009 - 03:31 AM

    hey thanks ….4 vaccine

  144. Pedro Bustamante
    Jun 10, 2009 - 06:24 AM


    Has any progress been made on getting the vaccine working for NTFS drives ?

  145. http://
    Jun 11, 2009 - 02:44 PM

    Hi from Ukraine!
    OK! And what about NTFS? It doesn’t work!
    Am I wrong? Explane, please! Thank’s!

  146. Pedro Bustamante
    Jun 11, 2009 - 05:02 PM

    Buenas tardes, USBVacine es una exelente aplicación ante los ataques tipo autorun, he visto que posee la posibilidad de dejarlo oculto y residente lo cual es una muy buena opción, pero tiene un problema, al intentar cerrar windows (Apagar, reiniciar o Cerrar Sesion) el programa no se descarga debidamente e interrumpe el apagado del sist. operativo. Quisiera saber si hay un parche o una version actualizada que solucione dicho inconveniente.

    Desde ya agradezco su ayuda y aporte.

    Richard Ricciardi

  147. Pedro Bustamante
    Jun 13, 2009 - 06:48 AM

    1. When use “USBVaccine.exe /resident /hidetray +system” and you want to logoff or shutdown or restart your system, a dialog appear and ask you a confirm, Why?

    2. Can you provide any other interface language?

    3. I want to automatically vaccine inserted usb drives. Is there any chance?

    Thanks for your program

    Please send answer to my email…
    Thanks again

  148. http://
    Jun 13, 2009 - 06:19 PM

    2 Jon
    >Need help urgently!!! Computer cannot shutdown after using Panda USB Vaccine. Everytime need
    to click on END PROGRAM for Panda USB Vaccine then only can shutdown computer. Please help.

    >Thank you.

    I decided this problem by editing Windows registry in WinXP:
    Windows Registry Editor Version 5.00

    [HKEY_CURRENT_USERControl PanelDesktop]
    Windows Registry Editor Version 5.00


    Whrere “4000”, “5000” and “20000” – time in milliseconds. You can edit, if needed, as you like.
    Copy this 2 text (from /// to ///) in two files with extension reg and run it.
    first file named: 1.reg must contain

    Windows Registry Editor Version 5.00

    [HKEY_CURRENT_USERControl PanelDesktop]

    Second – 2.reg

    Windows Registry Editor Version 5.00


    PS Sorry for my English, I’m from Russia.

  149. http://
    Jun 14, 2009 - 04:33 AM


    Formatted my SONY ICD-SX57 Digital Voice Recorder
    And tried Vaccination but only comes up Vaccination was not possible

    Please help

  150. Pedro Bustamante
    Jun 15, 2009 - 08:16 PM


  151. http://
    Jun 17, 2009 - 10:04 AM

    Buenos däias tengo un pendrive formateado en NTFS y el usb vacune no le puede vacunar. ¿solucion?

  152. http://
    Jun 19, 2009 - 11:28 AM

    very good tools thanks To panda !

  153. http://
    Jun 20, 2009 - 08:23 AM


    unable to execute file : schtasks.exe
    create process failed ; code 2

  154. Gari
    Jun 22, 2009 - 05:15 AM

    How to remove vaccination from usb with NTFS formatted ???

  155. Pedro Bustamante
    Jun 22, 2009 - 09:46 AM

    @Peter, can you try the following:
    1- open a command-line window
    2- type “schtasks” and then hit enter

    Do you get an error? Which one?

  156. http://
    Jun 22, 2009 - 04:33 PM

    How about a portable version in addition to the installer. The installer is nice, but I like to keep a portable version also. Thanks for the utility.

    Also, it says to read the help before you enable NTFS support, this help would be where?

  157. http://
    Jun 23, 2009 - 09:32 AM

    I try to to install command mode with /agreelicense] option for avoid the agreement dialog, but not work. It still present. Who can give me solution.

  158. Pedro Bustamante
    Jun 23, 2009 - 12:27 PM

    @redsec, try using /agreelicense along with either /silent or /verysilent parameter.

    For example:
    USBVaccine /silent /agreelicense /resident /experimentalntfs

  159. http://
    Jun 23, 2009 - 02:48 PM

    After vaccinating my USB drive, I find that I cannont UNvaccinated it (as I can my Computer).

    Why is there no option to REMOVE VACCINE from a USB drive (as there is for the Computer)?



  160. Pedro Bustamante
    Jun 25, 2009 - 03:45 AM

    @ pedro bustamante
    thanks a lot for your solution

    I use
    USBVaccine /silent /agreelicense /resident /autovaccinate /hidetray /agreelicense

    but I no seen USBVaccine process running.

  161. Pedro Bustamante
    Jun 25, 2009 - 05:20 PM

    @CurlySue, there’s no way to un-vaccinate from within Windows other than to backup your files and format the USB drive.

    @Redsec, you can use the same parameters but without /hidetray and then you’ll be able to see it running.

  162. http://
    Jun 26, 2009 - 02:18 AM

    Usb_Driver installed

    i have this
    what should i do ??
    is that virus ?

  163. http://
    Jun 26, 2009 - 03:21 AM

    Panda Tec

    Tried Vaccination on my SONY ICD-SX57 Digital Voice Recorder Stick using Beta version but it only came up Vaccination was not possible

    Today I have formatted my SONY ICD-SX57 Digital Voice Recorder Stick and tried New version released and when I plug the Digital Voice Recorder Stick into the USB the window stays the same INSERT USB KEY, version does not recognize Recorder Stick, Beta version at least did but Vaccination was not possible

    Need help why


  164. Tim Burton
    Jun 26, 2009 - 06:01 AM

    So what’s the real secret behind the un/detele/modifi/access/able autorun.inf file?

  165. http://
    Jun 26, 2009 - 08:13 AM

    Is good and is helpful thanks

  166. Pedro Bustamante
    Jun 26, 2009 - 09:30 AM

    @munky, download Panda USB Vaccine, vaccinate your computer & vaccinate each of your USB sticks. Then, one by one, insert your USB sticks and scan them with your AV or even better with

    @Mitchell, we'll try to get one of those and study the problem.

    @Tim Burton, cannot say, don't wanna give clues to the bad guys 🙂

  167. Mitchell
    Jun 26, 2009 - 04:16 PM

    Thanks Pedro

    Look forward to response, also have a Sony ICDU70 Digital Voice stick and had no problems vaccinating it! Just haven’t been able to on my SONY ICD-SX57 Digital Voice Stick

    Thanks again

  168. http://
    Jun 29, 2009 - 06:30 AM

    It is incorrectly installed in W2k.
    Does not work with the rights of the user.

  169. Pedro Bustamante
    Jun 29, 2009 - 07:08 AM

    @pedro bustamante

    but still the same

    I mean any process of USBvaccine is not running, no vaccinate any drive.
    I look for its on windows task manager, whether with /hidetray or not are the same.


  170. http://
    Jul 02, 2009 - 04:17 AM

    I’m glad because this latest version always vaccinate and never prompts, and still comes with the portable version. I have some suggestions: This program could delete the remaining AUTORUN_.INF file and could delete the folder RECYCLE inside the pen (or heal RECYCLE and make it unwritable by the virus too, it could be with hidden property). Also, I think if there would be a easy way (icon?) to distinguish this healed autorun.inf from infected autorun.inf to prevent people to make some mistake.

    Also, I noticed that in the installed version, a folder AUTORUN_.INF is always created, even the pendrive is empty (reformatted).

  171. http://
    Jul 02, 2009 - 06:29 PM

    Also I would like to suggest to add an option in the command line:

    USBVaccine.exe F G /resident F G

    The last F and G drive letters could be the drives that you like to use the /resident parameter.

    It could prevent some errors in the newer version. When I opened usbvaccine in one of my computer I got a error dialog box because the program is searching for drive A: (but I only use pendrive as drive F: and next letters). In older version it doesn’t happens, but I always need to click OK to exit or to shutdown the computer. =(

  172. http://
    Jul 03, 2009 - 12:04 AM

    I’ve inserted an infected USB and that tool automatically “vaccineted” it by doing it’s trick with the _existing_ infected binary autorun.inf.
    That makes it hard to fix it (I have to backup data and reformat).

    Please make your tool smarter!

  173. http://
    Jul 05, 2009 - 09:36 AM

    Well, I don’t know how effective this will prove in the long run, but I have to give you credit for this simple and effective approach. The culprit behind almost all viruses is the annoying autorun feature of windows. So far, I’ve been doing all data transfer in linux for the same reasons. But hopefully, I can do that in windows as well!

    Thanks for a great product!

  174. http://
    Jul 06, 2009 - 01:50 AM

    Great Utility. Makes sense, since I wasn’t able to find setting for disabling “Autorun for drives” under Vista (it was in WinXP) and the USB Firewall 1.1.3 is buggy and the USB Disk Security tool is not free and it runs every 10 seconds at about 10% of processing power. Panda runs quiet and very lite on resources. Very nicely programmed.

    Just to let everybody like me know.. If you try to vaccinate a large USB flash drive and start the process and you look and wonder, nothing is happening.. Panda window is “not responding”… just wait… For me it was a slow process, it took approx 15 minutes to vaccinate the drive. (and it is a very fast USB flash disk by all means).

  175. http://
    Jul 08, 2009 - 02:27 AM

    how revert the vacination pen drive?

    only format the device???

  176. http://
    Jul 08, 2009 - 04:20 PM

    Is there a way to keep vaccination even running other o.s. and after come back to Windows?

  177. wolf arts
    Jul 16, 2009 - 02:37 PM

    Bom dia,

    Gostaria de saber por que está aparecendo a seguinte mensagem quando vou vacinar o hd do meu pc.

    segue a mensagem:
    Vaccination was not possible. Only FAT volumes are supportaded right now

    pois ele está no formato NTFS.
    tem algum limita para vacinar? pois, meu hd é de 160GB mas so reconhece 148GB.

    Obs:vacinei dois hds NTFS e só esse da essa mensagem e tambem 4 pendrives fat32 e nao deu nenhum problema.

    Aguardo resposta

  178. http://
    Jul 19, 2009 - 06:26 AM

    Hello New User
    Install Panda Antivirus 2010 and forget every things about Virus , Scam and other Malware … i think the one of best software is in this time
    Thank alot Panda
    Keep it up
    Faisal Ali Khan from pakistan

  179. http://
    Jul 21, 2009 - 03:55 PM

    wolf arts:

    A capacidade de disco total nunca e totalemnte utilizada para armazenamento de informação. Parte é reservada para o sistema… por esse motivo é normal o disco parecer ter menos capacidade…

    A nova versao beta da vacina já permite a vacina do disco formatado em NTFS.

    Prestm atenção ao Mxone. O ikill não é compatível com a vacinação das pen's mas é compatível com a vacinação dos computadores e com programas que tornem as pen's protegidas contra escrita. Atenção que a protecção contra escria pode dar muitas dores de cabeça aos donos das pen's…

    (I've written in Portuguese because it is one of the most spoken language in the world…)

  180. Pedro Bustamante
    Jul 21, 2009 - 04:36 PM
  181. http://
    Jul 21, 2009 - 05:54 PM

    Pretty cool post. I just stumbled upon your blog and wanted to say

    that I have really liked reading your blog posts. Anyway

    I’ll be subscribing to your blog and I hope you post again soon!

  182. http://
    Jul 25, 2009 - 08:54 AM



  183. http://
    Jul 27, 2009 - 06:42 PM

    Has the suggestions posted by Satellite at 27 May 09 being implemented?

  184. http://
    Jul 27, 2009 - 06:46 PM

    opps …. not by Satellite but by mihi

  185. http://
    Jul 27, 2009 - 10:16 PM

    It appears from the above that I cannot reverse the “vaccination” of a USB drive with an autorun.inf file. I tried to re-start the vaccination program, but it stalls & never starts up (Not Responding is a s far as it goes). How do I remove this **** from my computer. As far as I can tell you have destroyed one of my backup drives.

  186. http://
    Aug 01, 2009 - 02:47 AM

    Kewl tool!
    In the past I’ve just created folder called autorun.inf and that worked for most of the usb virus but not all. This seems to work well.

    For those of you who install this & vaccinate your USB drives.. then complain about not being able to remove the protected autorun.inf file —
    Why have you not read the comments? I mean there have been several posts all asking same thing. Always the same answer by Panda.
    Cannot be edited from within windows & the only solution is to back up data & format the USB device.
    Other removal solutions have included using either a linux computer to remove the autorun.inf or bootable linux cd to remove it.
    No wonder people get infected so often … running/installing stuff without reading up what the program does. Same for “breaking” things..
    Someone says “this is kewl — run it” so people click it without thinking or doing a bit of research first.

    Geeezzz …
    READ the info provided by the Panda team about the tool before blindly running it.
    REad it, absorb it, understand it, then decide if it is useful to your situation.
    The info is there.

  187. http://
    Aug 04, 2009 - 03:18 AM

    New version still encounter Windows XP shut down problem (XP SP2 & SP3). Any idea how to solve this? Thanks~!

    Great work, keep it up~!

  188. http://
    Aug 04, 2009 - 09:14 AM

    thanks to panda team for such a excellent product for usb virus

  189. Pedro Bustamante
    Aug 04, 2009 - 10:04 PM

    @Jon, the problem you mention only occured under Vista, not XP. Are you sure its caused by Panda USB Vaccine? If you can, please troubleshoot and send me details to

  190. http://
    Aug 09, 2009 - 05:53 AM

    My BIG thank to PandaSecurity Team!!!

    This is truely the answer to my prayer all along. Been looking on how to disable those nuisance message from my AntiVirus. It deleted the virus but the autorun thingy from USB keep running the registry.

    With USBVaccine, problem no more! no more autorun… TQ TQ TQ to ya all..bless U…

  191. http://
    Aug 15, 2009 - 07:17 AM

    This is a very good product for protect all usb ports by preventing malware from other peripheral devices.we can proudly plug our usb devices when panda vaccination is on

  192. http://
    Aug 15, 2009 - 12:29 PM

    It’s good to take preventive actions

  193. mady
    Aug 15, 2009 - 07:37 PM


  194. http://
    Aug 17, 2009 - 10:15 PM

    Unsure whether C drive vaccinated. Check mark appears at illustration, but only horizontal bar entry is D drive and I believe that cannot be changed. Please be so kind as to reply.Thank you.

  195. Pedro Bustamante
    Aug 18, 2009 - 08:49 AM

    @Robert, are you talking about “Computer Vaccination” or “USB Drive Vaccination”?

    If “D” is your USB drive, insert it, open Panda USB Vaccine and then when “D” appears at the bottom of the screen, click “Vaccinate”.

  196. http://
    Aug 20, 2009 - 04:34 PM

    i installed this one
    and now no usb drives are working
    the safe removal icon appears in the task bar
    but the drive is not detected or its not appear in the ‘my computer’ folder
    even the usb mouse is not working
    what shud i do to revert this???????????????
    reply me

  197. http://
    Aug 26, 2009 - 10:18 AM

    thank’s panda, you save my usb

  198. http://
    Sep 02, 2009 - 09:50 PM

    Congratulations for great idea!
    USBVacine is an excellent tool against the plagues.


  199. http://
    Sep 03, 2009 - 01:48 PM

    Good day, I vacinated my computer and the usb drive. I found out that the usb is working fine. How come when I put dvd on my player, it would still auto run? hoping for answers…ty.

  200. http://
    Sep 03, 2009 - 02:01 PM

    Great tool. Thanks a lot!

  201. http://
    Sep 07, 2009 - 02:42 AM

    Cool! thanks.. Now my USB is secure..!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! byee..

  202. http://
    Sep 08, 2009 - 10:23 PM

    This software works great; thank you.

    One concern: When I enable NTFS, it tries to vaccinate my external hard drive and then hangs for some time. When it did this and my drive was inaccessible, I panicked and terminated the program. Is it supposed to protect hard drives just the same as flash drives, and if so, will it take a long time to vaccinate?


  203. Pedro Bustamante
    Sep 11, 2009 - 10:47 AM

    @Ben, the NTFS vaccination process takes some time, which is relative to the capacity of the drive (the larger the drive, the longer the time). While vaccinating it is important NOT to interfere with the process or cancel. If you have cancelled it, run chkdsk /f on the disk and run vaccination again.

  204. http://
    Sep 12, 2009 - 03:36 PM

    thank u

  205. http://
    Sep 13, 2009 - 01:06 AM

    A very good tool!!!
    The file AUTORUN.INF created in USB is actually undeletable! When I tried to unhide with the DOS command “attrib -r -s -h AUTORUN.INF” and then delete it, has the message “access denied”.

    I spread this tool for everyone!

    Thanks a lot.

  206. http://
    Sep 13, 2009 - 05:12 AM

    Need to update my Panda USB Vaccine

  207. http://
    Sep 13, 2009 - 10:03 AM

    realy so sorry panda vaccinate is verry bad tools it must be fixd………. because of many dameg to mi so i will never use panda never

  208. Pedro Bustamante
    Sep 13, 2009 - 06:53 PM

    @Ricky, simply download it again from this site and then install.

  209. http://
    Sep 18, 2009 - 12:39 PM

    I still would like to see a ZIP package of USB Vaccine so that I can extract it and go… The installer is nice, but for my USB toolkit, I’d like the .ZIP

  210. Pedro Bustamante
    Sep 19, 2009 - 01:03 AM

    @Keith, you can simply install on any PC and then grab the “USBVaccine.exe” file which gets installed into “Program FilesPanda USB Vaccine” and save it to your USB toolkit. The USBVACCINE.EXE file that gets installed is portable.

  211. http://
    Sep 20, 2009 - 03:24 AM

    No ato da instalação recebi a mensagem Unable to execute file: schtasks.exe Create process failed, code 2 O sistema não pode encontrar o arquivo especificado.
    Abri a janela do DOS, digitei “schtasks” com e sem apóstrofes, e recebi a seguinte resposta:
    Schtasks não é reonhecido como um programa interno ou externo, um programa operável ou arquivo em lotes.
    Como devo proceder, tenho um windows XP versão 5.1.260 que briga com um HD externo, que já foi devidamente formatado e não quero e não posso perder as informações que gravei.
    Obrigada pela atenção

  212. http://
    Sep 20, 2009 - 04:29 PM

    Understood… 🙂 Thanks for the response!

  213. Curd Wong
    Sep 22, 2009 - 02:46 PM

    Hi, great tool, only you schould not turn on automatic vacination, reason being if you put in a magic jack it will also be vacinated and the magic jack will not wotrk any more

    Took me some time but i managed to remove the protected autorun.inf and restore the original, but still a great tool

  214. Pedro Bustamante
    Sep 22, 2009 - 06:06 PM

    @Curd, during install you can simply not check the “automatically vaccinate any new USB” option and it won’t do it.

  215. http://
    Oct 06, 2009 - 09:04 PM

    hi! your program is best for defense usb drive! thank’s for good and free prog. when planing come new version with final support NTFS file system?

  216. Pedro Bustamante
    Oct 07, 2009 - 07:37 PM

    @Diwakar Palsule:

    That is hopefully the autorun.inf created AFTER vaccination, so you have nothing to fear. The idea is precisely to have it there.

    WinHex trick didn’t worked here.

    To have an “undo option” regarding created autorun.inf files is not a good idea because malware authors could reverse engineering the app and make us unhappy.

    There’s a new version ( available @

    Tested with 5 sticks (1, 2, 4, 8 and 16 Gb) along six months and everything is working fine. Thanks a lot and greetings from Brazil.

  217. Pedro Bustamante
    Oct 12, 2009 - 06:46 PM

    I don’t know why it is diabled to vaccine usb in the program. plz help

  218. Pedro Bustamante
    Oct 14, 2009 - 11:20 AM

    i vaccinate my usb,but now there is a big problem:
    i can not copy , read or write any document in my flash usb. the bigger problem is that i can not even format it.
    pls guide me if there is a solutionotherwise do not publish these … programs.

  219. Pedro Bustamante
    Oct 14, 2009 - 04:05 PM

    @Lord, this does not seem to me related to USBVaccine. It seems as your OS is not able to access the USB drive correctly. Try inserting it in another PC or different OS to see if it’s accessible from there.

  220. http://
    Oct 14, 2009 - 07:13 PM

    After instal this program on few computers (Windows XP +SP2) I’ve been getting an error message every few minutes :

    Windows – drive not ready
    Exception Processing Message c00000a3 Parameters
    75b6bf9c 4 75b6bf9c 75b6bf9c

    What is it?
    Can anybody help me to remove this problem


  221. http://
    Oct 15, 2009 - 01:45 PM


    This happen if in motheboard BIOS Enable Floppy Drive Controller, but the Floppy Drive is absent. Please DISABLE you Floppy Drive Controller in BIOS, and problem must be solved.
    PS Sorry for my English :).

  222. Pedro Bustamante
    Oct 15, 2009 - 07:42 PM

    Thanks Dale !

  223. Pedro Bustamante
    Oct 17, 2009 - 02:33 AM


    I have installed a software (PortableApps) on my USB flash drive, but after using the Panda USB Vaccine, my flash drive looses the autorun function, so that I have to manually run the PortableApps excutable file in order to use it.

    Is there any way to vaccinate my drive by just changing the original autorun.inf file attributes to unwritable, instead of overwriting the autorun.inf with a blank file with unwritable attributes?

  224. Pedro Bustamante
    Oct 18, 2009 - 10:00 AM

    its simply great ………

  225. Pedro Bustamante
    Oct 18, 2009 - 01:20 PM

    Hi there,i am using the Panda USB and AutoRun Vaccine first guestion is,is this the latest ie most recent one,as i am not sure i can tell.

    Also lately the vaccine does not seem to work effectively anymore,as during scanning USB memory sticks,my ‘real time’Antivirus finds a virus sometimes NOT on the USB stick but on the computer.This has happened twice now even though Said USB memory stick and computer ARE vaccinated.Ä°t seems as though the AutoRun is not disabled as it should be.

    Ä° would appreciate any reply.Thank you.

  226. Pedro Bustamante
    Oct 20, 2009 - 07:54 AM

    why is it connect network ?


  227. Pedro Bustamante
    Oct 20, 2009 - 10:24 AM

    @Peter, what do you mean exactly?

  228. Pedro Bustamante
    Oct 22, 2009 - 02:09 PM

    “Vaccination not possible due to error reading volume on pen drive”

    What is it?


  229. Pedro Bustamante
    Oct 23, 2009 - 09:32 AM

    @Iuri, can you access you USB drive otherwise and write to it?

  230. Pedro Bustamante
    Oct 26, 2009 - 07:43 AM

    how do ubdate panda vaccine

  231. Pedro Bustamante
    Oct 26, 2009 - 09:30 AM

    @alireza, simply uninstall the version you have installed, then download the new version and install again.

  232. avinash
    Dec 04, 2009 - 09:15 AM

    HI this is avinash from india i am having an autorun.inf virus in my personal computer
    so i need sugesstion from your side, mean to say how i suppose to remove that virus from my computer

  233. robert
    Dec 07, 2009 - 02:30 AM

    in usb just said…..vaccination was no possible

    no fue posible la vacunacion

  234. Pieter
    Dec 08, 2009 - 09:34 AM

    Hi I have selected to show all system files, on my memory stick I have a autorun.inf and a floder called zolander. If I format the stick then the files reappear when you refresh, your usb vaccine says the stick is vaccinated and does not pick up the autorun.inf file as a virus
    Please can you assist

  235. pieter
    Dec 08, 2009 - 02:36 PM

    I posted a problem here today 7th & now it does not appear ??? it was posted on site & I was waiting for reply ????

  236. Greg Bernrd
    Dec 08, 2009 - 03:17 PM

    get error reading volume on ie8 sp 2 vista home. tried the new vers on download not help. beta link would be nice if fix problem . thanks did vaccine comp. just not usb yet.

  237. Omar
    Dec 09, 2009 - 07:50 AM

    thx for this tool
    I was in bad need for somthing like it
    I hope it will be benfit for me

  238. Jawad
    Dec 09, 2009 - 04:52 PM

    I clicked vaccinate usb and it took too much time because my cpu was busy so i removed the usb and now the usb is not detected by any cmputer. IT RUINED MY USB.

  239. PiETER
    Dec 10, 2009 - 06:20 AM

    With reference to below, I’m still waiting for feedback ????

    Hi I have selected to show all system files, on my memory stick I have a autorun.inf and a floder called zolander. If I format the stick then the files reappear when you refresh, your usb vaccine says the stick is vaccinated and does not pick up the autorun.inf file as a virusPlease can you assist>

  240. Jose
    Dec 10, 2009 - 04:26 PM

    Great solution to the nasty autorun.inf bugs, but …

    1. I’m still having a little bit of trouble with the vaccination process.
    This is due to having other antivirus softwares (trendmicro) that block user access to usb pens… The workaround was to unload TM and then it worked.

    2. Hoping to see any “settings” menu …

  241. Paulo
    Dec 10, 2009 - 11:56 PM

    this a message when run the ‘USB VACCINE” : exception processing message c0000a3 parameters 75b3bf7c 4 75b3bf7c 75b3bf7c

    Cancelar tentar novamente continuar

  242. Jo
    Dec 11, 2009 - 06:11 AM

    Autorun.inf file is an application file embedded into your memory stick, its no threat to Panda, this file outo opens your memory files for you to access more with ease. it cant be deleted its emabedded into its ‘fixed startup memory’.chow@PiETER

  243. Pieter
    Dec 11, 2009 - 12:43 PM

    After posting a problem here and still waiting for response i Feel that this place to post problems is a total waste of time you can simply look at the posts and the fact there is zero response. PANDA SOFTWARE I AM REALLY DISAPPOINTED !!!!

  244. Pinco Pallaccio
    Dec 13, 2009 - 04:35 PM

    Nice tool, but the technique used to “permanently” vaccinate USB pen drives, since v1.0.1.4 (before this version, it used the autorun.inf folder + reserved names like LPT1), involves a risky operation, i.e. direct editing of the FAT tables, described here:
    Be careful…

  245. Ufuk ARSLAN
    Dec 13, 2009 - 05:54 PM

    1 – I want to choose icon files


    2 – I want to give name to Usb Drive


    3 – Panda folder can be create in Usb Drive & include Scanner.exe

    Scanner.exe = Your USB Drive Viruses Scanner & Cleaner File

    4 – When i plugin USB Drive there can be a part which i can choose with clicking right mouse.

    shellPanda=Scan with Panda USB Vaccine


  246. christian
    Dec 14, 2009 - 09:49 AM

    Thank you so much for this!!! I’ll blog this one 🙂

  247. Marta López
    Jun 30, 2014 - 11:55 AM

    Hello. If you have vaccinated your external hard drive, the only way you can remove it is formatting it. Thanks!

  248. C vincer
    Sep 30, 2016 - 08:18 AM

    I have a 64GB SDXC SD card. The filing system is exfat. Panda vaccine will not vaccinate this (error message ‘volume format support not active’)

    Is their a patch ?


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