Windows Minesweeper [CHEAT]
 

      Cheat:
      
       1. Choose a dark desktop background bitmap.
       2. Start Minesweeper and close all other applications to icons.
       3. Type in YZYYZ, press [Enter] and [Shift+Enter].
       4. Now there is a little spot on upper left side of the screen
          that will only flash if a field has no mine.