The Ctrl-Alt-Del in NT/2k is for
security, actually. You can define the login program to run at boot and that could contain some
trojan, so
microsoft set
winnt up to run
%WINDIR%\login.exe every time, and the
executable must be digitally signed by
M$ to run.
So, this all means to you that if your NT box is going down, then at least you know that the l33t h4x0r who did had enough money to pay m$ to sign his program. :)
(Actually, Microsoft will test the program out (highly skilled staff:) before they OK it.)