How to disable CAD (Ctrl-Alt-Delete) in OS/2
By Timo Maier
If you want to disable Ctrl-Alt-Delete edit \os2\boot\kbdbase.sys with a binary editor like HED: search for
... B4 07 B2 25 FF 1E ?? ?? EB
and change to
... EB 06 ....................
Source: Veit Kannegieser