BOOT SECTOR INFECTOR

A virus, which infects the original boot sector on a floppy diskette. These viruses are particularly serious because information in the boot sector is loaded into memory first, before virus protection code can be executed. A "strict" boot sector infector infects only the boot sector, regardless of whether the target is a hard disk or a floppy diskette. Some viruses always attack the first physical sector of the disk, regardless of the disk type.