Delete key must be pressed last in alt-ctl-del
The delete key must be pressed last for the alt-ctrl-del security sequence to
work in NT. You can hold down alt and ctrl, then press del and it will work.
Make delete anything but the last key to be pressed and it will not work. Hold
down alt-del, press ctrl - nada. Hold down ctrl-del, press alt - nada. The
delete key press must be last. Try it yourself.