Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.


Threat LevelModerate threat
DistributionNot widespread
Common name:Polyboot.B
Technical name:Polyboot.512.B
Threat level:Low
Effects:  It infects floppy disks and the boot sector of the hard disk.

Affected platforms:


First detected on:May 8, 2002
Detection updated on:June 4, 2003

Brief Description 


Polyboot.B is a boot virus that does not have any destructive effects, which infects the boot sector of hard disks (Master Boot Record or MBR) and floppy disks (Boot).

Polyboot.B goes memory resident in order to infect the MBR of the hard disks in the infected computer and the Boot of the floppy disks used.

Once the computer is infected, Polyboot.B infects all floppy disks used in the computer, provided that they are not write-protected.

Visible Symptoms 


The only indication that Polyboot.B has infected a computer is that it has problems starting.