SuperFast Shutdown makes Windows shutdown and restart instantly
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"A double click on Super Fast Shutdown and Windows closes in a fraction of a second.
With the freeware SuperFast Shutdown you can close or restart Windows 2000 or XP within a fraction of a second. Make sure you close all documents before using the SuperFast Shutdown tool, otherwise you run the risk of loosing your data. The free tool takes no consideration of running programs and will not ask if you want to continue or not!
Superfast Shutdown is extremely powerful! Use at your own risk! Although it has never been reported, regular usage could possibly cause disk corruption."
SuperFast Shutdown - Freeware - EN - Download.CHIP.eu
From program's home page: SuperFast Shutdown Gone Forever
Windows XP, Windows Vista, Windows 7
Supports 32 and 64 bit versions.