On Linux machines you have the handy
Ctrl+Alt+Backspace to restart the X server, if your GUI hangs.
Is there something comparable on Windows? I.e., a combination of key strokes to kill/restart the Windows shell in situations where the task manager is not a viable way?
EDIT: To make my point clear: Suppose, the UI freezes, because some app goes banana. Then you can spend hours waiting for the task manager to come up and get rendered after hitting Ctrl+Alt+Del, or you can just use this magical keystroke: (fill in your answer here) and you will be brought back to the login screen magically, just like Dorothy but without red shoes... ;-)