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Try this: What about upgrading from hidden Administrator account? - Windows 10 Forums
If no help, try upgrading from a Clean Boot: Troubleshoot Problem with Clean Boot in Windows 8
Finally after a week, I had to do a clean installed but I finally got it to work. Thanks Ztruker.
Have you completed a upgrade install on this computer? If not, you will not be able to activate the clean install you just did.
It shows that its activated.