I accidentally deactivated my windows installation and it wont activate anymore.

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L-666

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So i did a BIOS update and it asked me afterwards if i wanted to reset fTPM, it didnt say anything about windows installation tho, only that if i had bitlocker or something that i would need to backup those keys.So it booted fine but when i logged i saw the watermark with 'activate windows'.I went into registry editor to retrieve the key i was using to activate windows (i upgraded from 10 to 11 and brought that key with me), but when i put that in windows it said it cant activate because of hardware changes or because it is a windows 10 key, even though i've been using windows 11 with this key

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