Computer Viruses

If your computer is infected with a boot sector virus, the virus tries to write copies of itself to the system areas of floppy disks and hard disks. Then the infected floppy disks may destroy the computer security of other computers that boot from them, and the virus copy on the hard disk will try to infect still more floppies. Some viruses, known as ´multipartite´ viruses, can spread both by infecting files and by infecting the boot areas of floppy disks.