INT 2F - F-PROT v2.x - VIRSTOP - ENABLE/DISABLE BOOTSECTOR READ CHECKING
AX = 4653h ('FS')
CX = 0007h
BL = new state of bootsector checking (01h = disabled)
Program: VIRSTOP is the resident virus-checker from Fridrik Skulason's F-PROT
virus/trojan protection package