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A bug in what appears to be the Microsoft Windows activation service is causing Windows 10 Pro licenses to be downgraded to Windows 10 Home and then stating that Windows is not activated.
This bug appears to be widespread with many users reporting that Windows is stating that their license is not activated and prompting the user to troubleshoot the problems.
Windows 10 Pro not activated We can’t activate Windows on this device because you don’t have a valid digital license of product key. If you think you do have a valid license or key, select Troubleshoot below. Error code: 0xC004C003 If you’re having problems with activation, select Troubleshoot to try to fix the problem.
When users perform
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