the machine read the boot sector program, which normally loads the operating system, but ran the infected program instead. Once infected, the boot virus replicated itself onto all subsequent ...

Aimed at the IBM PC, the Brain virus only slowed down the floppy disk drive and did no other damage. By replacing the boot sector in the floppy disk, a message would display claiming infection and ...

That particular partition's boot sector is used to start the operating ... happen for various reasons—maybe a hijacking by an MBR virus, or corruption thanks to a physically damaged hard drive.

It targeted IBM PCs and would replace a floppy disk's boot sector with a copy of the virus and flag the real boot sector as bad. Infected boot sectors would read "Welcome to the Dungeon (c ...