After my computer did an update, it says I need to activate windows.

[Windows 11]

I installed from windows 10 pro with product key. Microsoft gave free upgrade to windows 11 pro. I have no product key. After my computer did an update a couple days ago, it is now telling me to active windows. Trouble shoot did not help. I get Error code: 0xC004F213. I would call Microsoft but I don't see a number to call for assistance, nor can I get to a live chat. I just need some help to figure this out as I'm not sure what to do.

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