WinKill

Allows simple and efficient ways to turn off your computer. A little red ball will appear in the systray.

That is your Shutdown button. You can set up options such as the type of shutdown to initiate when the button is pressed. This is also 'script' friendly.. once this program is running, executing the file again will cause it to shutdown according to the options. Options include Hard Shutdown, Normal Shutdown & Confirmation Window. You can also specify a time to shutdown the computer. This will execute once again on the time you specify according to the options described above.