The game normally disables the [Ctrl] + [Alt] + [Delete] 
warm boot combination. However, If a mission ends badly 
and you wish to stop the game from saving that result, 
press [Ctrl] + [Alt] + [Delete] during the brief period 
of time when the game loads the next part of the program. 
The aborted mission will not be on file when the game is 
restarted.