How can we set Windows to completely shut off after a period of inactivity?

Due to a longstanding unknown hardware problem, my desktop never wakes up
from a BSOD if "hibernation" or "fastboot" is enabled so I turned them off.
o Windows 10 BSOD indicates a hardware problem - but what hardware is the problem?
https://groups.google.com/forum/#!topic/alt.comp.microsoft.windows/u0ay9h777Wg

What I'd like though is for the desktop to COMPLETELY SHUT OFF after a
given time of inactivity (for example, an hour or so).
o Not sleep.
o Not hibernate.
o Not fastboot.

But completely shut off. Fully. Completely. No power to the motherboard.
o Does that option even exist?

Power options seem to only be for "sleep" & not "completely power down".
o Win+R Control Panel\Hardware and Sound\Power Options
"Put the computer to sleep"

How can we set Windows to completely shut off after a period of inactivity?
--
Usenet allows people to share ideas on problem solving to help everyone.