ShutDown is a program that can automatically shut-down Windows/your computer - designed with FlasKMPEG in mind (since FlasKMPEG's auto shutdown doesn't work properly in Windows 2000), but will work with most other programs. This program has been tested to work in Windows 98/Me and NT/2000.
You may also be interested in reading this - a tip on shutting down your computer without the need to use one of the shutdown programs below.