An MBR virus is a common type of virus that replaces the MBR with its own code. Since the MBR executes every time a computer is started, this type of virus is extremely dangerous. MBR viruses normally enter a system through a floppy disk that is installed in the floppy drive when the computer is started up. Even if the floppy disk is not bootable, it can infect the MBR.

Getting the Boot
Describes how to plan, partition, install, and remove DOS, OS/2, NT, and other operating systems on the same disk at the same time. Includes information on how to diagnose boot time failures. Topics include: FDISK, MBR, BootManager, Dual Boot, boot sectors, primary partitions, and logical volumes.