Fix Activation Error code 0xC004C003 in Windows 10

So you Took advantage of Free Upgrade to Windows 10 for Windows 8.1 and 7 users ? Well done, With All new Windows 10, Also comes Errors and bugs which Microsoft will be working hard to fix but One of the Common error that most of the New Windows 10 users are getting is Error code 0xC004C003. Its a Activation error which says the server determined the keys to be invalid or keys are blocked. For users who Directly Upgrade to windows 10 from Windows 7 or 8.1, There should not be such error. But this activation error will be shown to those who Fresh installed Windows 10. I will try to help you Fix this Activation Error 0xC004C003 in Windows 10. – See more at:


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