NoStop

                                       by

                                 J. Scott Sanbar

                                Maker Constructs
                                 8100 Glenwood
                            Oklahoma City, OK 73114

                                CIS: 73760,3304
                              FidoNet: 1:147/55.6



NOSTOP.SYS - disable CTRL-ALT-DEL, CTRL-BREAK, CTRL-C, CTRL-2 and
             ALT-(Keypad 3) for MS-DOS 2.x and higher.  Installable device
             driver with minimal RAM use.  Should work on any IBM
             PC/XT/AT/PS/2 or true compatible.  Resident portion: 282 bytes

NOSTOP.SYS is a very simple device driver installed at boot-up via the
CONFIG.SYS file.  It throws away the CTRL-ALT-DEL (warm boot), CTRL-BREAK,
and CTRL-C keyboard combinations, effectively making any operation including
batch files, executable programs and DOS itself unstoppable from the
keyboard.  Once installed, the only way to halt the computer is to hit
the reset button or turn off the computer.  It also throws away CTRL-2,
which flags a CTRL-C due to a bug (feature) in the DOS kernel, and disables
the ALT-(KEYPAD 3) way of entering a CTRL-C into the keyboard buffer.
NoStop's sister program, NSCONFIG.EXE, allows command line enabling/disabling
of any or all of the key combinations at will.

TO USE:  simply include this line in your CONFIG.SYS file that resides in
the root directory of the boot disk:

DEVICE=NOSTOP.SYS

The above assumes NOSTOP.SYS resides in the root (\) directory of the boot
disk.  If NOSTOP.SYS resides in some other directory you must include a
path.  For instance, if NOSTOP.SYS resides on the C: drive in the \UTILITY
subdirectory:

DEVICE=C:\UTILITY\NOSTOP.SYS

NOSTOP.SYS should be included as the last driver in the CONFIG.SYS file,
so that it will have first shot at handling the key combinations.

NSCONFIG.EXE is the sister program that allows enabling/disabling of
the various key combinations NOSTOP.SYS is able to capture.  Syntax:

NSCONFIG [C][B][W][2][3]

where:    C or c enables CTRL-C (ie, allows it to pass through untouched)
          B or b enables CTRL-BREAK
          W or w enables warm boot (CTRL-ALT-DEL)
          2      enables CTRL-2
          3      enables ALT-3(Keypad)

NSCONFIG can be called as often as needed, and the results are absolute, not
additive.  NOSTOP.SYS defaults, on installation via CONFIG.SYS to all
respective keys disabled.  Then, you can enable the desired keys in the
AUTOEXEC.BAT or via the command line as needed.  Examples:

NSCONFIG            - disables all keys
NSCONFIG W          - disables everything but warm boot
NSCONFIG 2w3        - disables everything but warm boot, CTRL-2 and ALT-3
NSCONFIG CBW23      - enables all key combinations
NSCONFIG c b w      - error, no spaces allowed

The various switches (C, B, W, 2 and 3) may be in any order, but no spaces
are allowed between them.

NOSTOP.SYS is shareware and is fully copyrighted.  You may use it freely
and distribute it in its original form along with this text file and the
sister program, NSCONFIG.EXE.  However, you may not alter it or distribute
it without this text file, and may not charge to distribute it.  If you wish
to use NOSTOP.SYS, you MUST send a $5.00 registration fee to the address
below:

          J. Scott Sanbar
          8100 Glenwood
          Oklahoma City, OK 73114

          CIS: 73760,3304

You may use NOSTOP.SYS for a trial period of TEN (10) days after which time
you must either register or discontinue its use.  The $5.00 fee is on a per
computer basis, so if you are on a network and have 5 computers that use
NOSTOP.SYS, the registration fee would be $25.00.

NOSTOP.SYS may not work with 386 protected mode operating environments like
Windows 3.0.  IE, NOSTOP will not disable warm boot under Windows 3.0 in
386 Enhanced mode, although it will work fine in real or standard mode and
will still throw away CTRL-BREAK, CTRL-2, ALT-3 and CTRL-C.

The device driver NOSTOP.SYS, this text file and the sister program,
NSCONFIG.EXE are all:

Copyright (c) 1990 by J. Scott Sanbar.  All Rights Reserved.
Shareware

FINAL NOTE:  NOSTOP.SYS is a very effective means of limiting access to the
command line and hence protecting networks and computers from malicious
hands.  Given programs that will not drop to the command line, using a
menuing system and batch files to access various programs and limiting
access to the reset button, power cord and on/off switch will virtually
guarantee that no harm may be done in academic or corporate settings.
Password protected access to NSCONFIG will allow enabling of needed key
combinations without which a network admistrator would be inconvenienced.

If you find any bugs or oversights, or have any suggestions, feel free
to send me netmail or snail mail.  Enjoy.