JDFan, I think the setting is in your PC's BIOS, not in windows.
While PC is booting (before Windows logo appears), hit F2 or DEL key. (Some PCs use a different key, maybe F10, but F2 or DEL is the most common.)
This will take you into a simple menu. This is BIOS.
Search in there until you find power down options.
If it's not there, then you cant use this option.
I use my front end (Mala) to shut down the machine when it exits. This insures windows shuts down properly.
I use a button wired to my PC pwr on button to turn the PC on.