The first easy step is to reset the CMOS and see if it helps you boot into Windows. To reset or clear CMOS, follow these steps: Force shut down your computer by pressing and holding the power button.
Windows 11 shutdown bug explained with causes, fixes, and workarounds to stop restarts, battery drain, and failed power-offs after updates.
Microsoft said my PC can't run Windows 11, but I upgraded in 5 minutes anyway - here's how ...