9 Ways to Fix Windows 10 Suddenly Not Activated Issue
https://techwiser.com/fix-windows-10-suddenly-not-activated-issue/
WEBJun 25, 2021 · 1. Restart Computer. Irrespective of the device or operating system, this solution works like an incantation to get back your original setting or, in this case, activated Windows 10. If a bug or glitch is causing this Windows 10 not-activated issue, you may be able to fix it by restarting your computer.
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