Windows 11 (or 10) doesn't include an option to schedule an automatic shutdown of your computer, but it's possible to use ...

I have an older Windows 2000 PC (Pentium 1 MMX era) and whenever it goes to shutdown it won't power off automatically. Instead it displays a "It is now safe to turn off your computer." screen.

If you have accidentally turned off your Windows computer during the factory reset and now you cannot use your system, use the following fixes: Disconnect all the peripherals and the power cord.