Windows11 Prompts "Secure Boot KEK Update" Should I Install It?

if you need secure boot, which is a very good security feature, then yes, update it, else don't do it, but if windows is forcing you, open regedit, go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator

and and if you see flyout options set to 10, set it to 0 and you will have a plain shutdown or restart