Windows 10: Couldn't activate after re-install Windows 10

I bought two computers with Windows Home originally. I then updated the computers to Windows Pro using the product keys which I bought.

I was forced to re-install the Windows of one of them because the Windows was corrupted after a recent unsuccessful update and incomplete rollback. I created a USB media using the Windows Update from Microsoft website. The system is now reverted to Windows 10 Home. I re-applied the Windows Pro product key, but the system did not accept it. I've forgotten which key is for which computer, but neither of the two product keys were accepted.


What can I do now?



Monica

:)

 

Windows 10 will not activate Error code 0x803F7001

thanks
I activated my Windows 10 from product key Windows 7

 

Installing Windows 10 using Windows 7 key

Nope, you need to install Windows 10 first and make sure the Windows 7 key is transferred to your Windows account after you've installed Windows 10 (not quite sure how that works). I missed the last step and I could not activate Windows 10 after a re-install... Microsoft seem to have done everything they can to make it a PITA. Also, it's technically too late to do this now anyhow, as the upgrade offer has expired. But KMSPico works quite well...

As for getting rid of Windows, delete the Windows folder.

 

windows xp installation and dual core am

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