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From: timmons@atccad.enet.dec.com
Newsgroups: comp.os.msdos.misc
Subject: Re: HELP!! Prevent CTRL-ALT-DEL and CTRL-C during boot
Message-ID: <1991Apr18.212741.12164@e2big.mko.dec.com>
Date: 18 Apr 91 21:27:41 GMT
References: <1991Apr18.105718.26787@csc.canberra.edu.au>
Sender: guest@e2big.mko.dec.com (Guest (DECnet))
Reply-To: Timmons@atccad.enet.dec.com
Organization: Digital Equipment Corporation
Lines: 16


    Try this -  Load MSDOS.SYS into debug and
    search for CD 23.  It may be in more than one place.  The right
    place should look like this  F8 CD 23 FA (CLC, INT 23, CLI).  Just
    change the correct CD 23 to 90 90 (NOP, NOP) and write it back out.
    Use that MSDOS.SYS on your disk.  Uh, one minor problem, I don't
    think Microsoft approves of people distributing hacked versions
    of their operating system.  So consult your lawyer before doing this.
    
    Also, you might need to re-enable Ctrl-C.  You could write a little
    program called from your batch file (the last line) that pops CD 23
    back into memory where it should be.  

    Hmm... all this sounds as bad as a virus!

    Ray T.