Shutdown Screensaver
Shutdown screensaver powers down the computer after 2 minutes from startup. It works on all versions of Windows. It can be very useful if it happens often to you to forget turning off your machine. It displays number of seconds left to shutdown. You can terminate the countdown by deactivating screensaver.
Powerdown Program
PowerDown is a simple program that powers down (turn off) the computer. (Unlike NT build-in shutdown.exe, it powers off computer - not only halt it and display message that it is safe to turn computer off). It may be very usefull when you want to turn off your computer at specified time. In NT systems "at" command can be used to execute PowerDown.exe at desired hour.For example if you want to turn off computer at 5 am, type at command prompt: "at 5:00 C:\Windows\PowerDown.exe"
(You need to copy PowerDown.exe to C:\Windows directory first.) Of course you can keep it in any other directory. You will have to pass full path to PowerDown.exe to "at" command.
Notice! Both Shutdown Screensaver and PowerDown.exe shuts down computer unconditionally, this means computer WILL go down. All applications will be closed, if any application has unsaved document/data this application will be terminated and all unsaved changes will be lost. So be aware what you are doing and use these software wisely.