Definitions for "Boot sector virus"
A boot sector virus usually spreads via infected floppy disks. When a user unintentionally leaves the infected disk with a boot sector virus, the boot sector of the user´s local drive (C:\) will also be infected. Boot sector viruses simply take up memory space or may contain a malicious load. The simplest method to avoid Boot sector viruses is to alter the CMOS settings to boot from the local C:\ drive first, rather than from floppy.
A virus that loads each time the computer is booted and can make the data stored on a disk inaccessible. bpi Bytes per inch.
Boot sector viruses are spread through the use of infected floppy disks. This can happen when a user leaves a floppy disk in drive A:\.When the system is started up again, the computer attempts to boot the computer from the floppy disk. If the disk has a boot sector virus, the virus will attack the local drive. If the floppy disk isn't a boot disk, the user will be told to remove it and reboot, however, the damage may have already been done. Some of these viruses are benign, but other can contain a malicious "payload." To prevent boot sector viruses, change your CMOS settings to boot from the local C:\ drive first, rather than from floppy.