This is [Mod Removed - profanity] I don't know who you are Palcook, but I happened to me as well, MSI MTB self built with genuine W11 license.
Each time I replace upgrade the BIOS, Windows asks me to change my pin#, login with my MS account and windows was deactivated.
I rentered the Windows 11 key and it reactivated it.
Microsoft is a bag of [Mod Removed - profanity] .