x
48h OFFER
If you're already a customer of
our homeusers protection,
renew now with a 50% off
RENEW NOW
x
SPECIAL OFFER
If you're already a customer of
our homeusers protection,
renew now with a 50% off
RENEW NOW
x
HALLOWEEN OFFER
take advantage of our
terrific discounts
BUY NOW AND GET A 50% OFF
x
CHRISTMAS OFFER
Buy the best antivirus
at the best price
BUY NOW AND GET A 40% OFF
x
SPECIAL OFFER
Buy the best antivirus
at the best price
BUY NOW AND GET A 50% OFF
x
BLACKFRIDAY OFFER
Buy the best antivirus
at the best price
TODAY ONLY UP TO 70% OFF
x
CYBERMONDAY OFFER
Buy the best antivirus
at the best price
(Only for homeusers)
TODAY ONLY UP TO 70% OFF
Active Scan. Scan your PC free
Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Encyclopedia GetVirusCard True 0

Form

 
Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Form
Technical name:Form.A
Threat level:Low
Alias:FormA,, Form 18, Form-18, Form_18, Form Boot
Type:Virus
Effects:  It infects the boot sector of floppy disks and of hard disks. It prevents the computer from starting up correctly. It emits a clicking sound when a keyboard key is pressed on 18th of any month, on computers where the KEYB.COM keyboard driver is not installed.

Affected platforms:

MS-DOS

Detection updated on:July 10, 2008
StatisticsNo
Country of origin:KOREA, NORTH
Family:FORM

Brief Description 

    

Form is a boot virus that infects the boot sector of floppy disks and of hard disks.

Form infects the hard disk of a computer when it is booted from a floppy disk that is infected with this virus. From then on, all of the floppy disks used on that computer will be infected and it will have problems starting up.

Form has been programmed to play a clicking sound through the PC speaker, whenever the user presses one key on 18th of any month. However, this will only occur on computers where the KEYB.COM keyboard driver is not installed.

Its effects are more destructive on Windows NT computers, as after infection, it will be necessary to repair the boot sector of the hard disk.

Visible Symptoms 

    

The only visible symptom is that infected computers have problems starting.

In addition, Form emits a clicking sound through the PC speaker whenever the user presses a key on 18th of any month, as long as the KEYB.COM keyboard driver is not installed. However, this is not very common, as most computers have this driver installed by default.