How do I get my Windows 11 system to reboot? System is locked and will not let me reboot

System is locked and will not let me reboot. Screen is all maroon with the statement “Working on updates…100% complete…Don’t turn off your computer”.

This has been on the screen for several hours. The circle of dots above the wording has never stopped moving.

How do I get my Windows 11 system to reboot?