Hello @DohReiEgon, and welcome to the community.
The problem occurs when hardware components have been replaced and the Windows version is no longer recognized.
First try your Windows version by entering your activation code to solve the problem: Activate Windows - Microsoft Support
If this is not the case for you, please check whether an error is recognized here: Get help with Windows activation errors - Microsoft Support
Please give us a feedback if these solutions could help you.
Regards,
EastClintwood
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