VSAFE

Continuously monitors your computer for viruses and displays a warning when
it finds one. VSAFE is a memory-resident program that uses 22K of memory.

Do not use the VSAFE command when Windows is running.

Syntax
    VSAFE [/option[+ | -] ...] [/NE] [/NX] [/Ax | /Cx] [/N] [/D] [/U]

Switches

option
    Specifies how VSAFE monitors for viruses. Use a plus or minus sign (+ or
    -) after the number to turn an option on or off. The following list
    describes the options you can choose.

    1
        Warns of formatting that could completely erase the hard disk. The
        default setting is "on."

    2
        Warns of an attempt by a program to stay in memory. The default
        setting is "off."

    3
        Prevents programs from writing to disk. The default setting is
        "off."

    4
        Checks executable files that MS-DOS opens. The default setting is
        "on."

    5
        Checks all disks for boot sector viruses. The default setting is
        "on."

    6
        Warns of attempts to write to the boot sector or partition table of
        the hard disk. The default setting is "on."

    7
        Warns of attempts to write to the boot sector of a floppy disk. The
        default setting is "off."
    8
        Warns of attempts to modify executable files. The default setting is
        "off."
/NE
    Prevents VSafe from loading into expanded memory.

/NX
    Prevents VSafe from loading into extended memory.

/Ax
    Sets the hot key as ALT plus the key specified by x.

/Cx
    Sets the hot key as CTRL plus the key specified by x.

/N
    Allows VSAFE to monitor for possible viruses on network drives.

/D
    Turns off checksumming.

/U
    Removes VSAFE from memory.