My Windows 11 Deactivated randomly

[Microsoft Windows]

I was going through troubleshooters for my audio as I thought it was bugged and after running one, the Activate Windows popped up on the bottom right of my screen. I tried uninstalling the latest update and that did fix the pop-up on the bottom right, but in settings it still said Windows was not activated, error code 0x803fa067.I had a code that I received when I bought my PC which I used several months ago with no problems until now. When putting in the same code, it says it is invalid.

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