Windows 10: Windows 10 not activated after upgrade from 7 even though I bought the key for the upgrade

Discus and support Windows 10 not activated after upgrade from 7 even though I bought the key for the upgrade in Windows 10 Updates and Activation to solve the problem; Hello. Not sure how this works but I needed to enter a product key when I used the upgrade option from windows 7 to 10. My version of Win7 was not... Discussion in 'Windows 10 Updates and Activation' started by Ben Irvine, Jan 17, 2020.

  1. Windows 10 not activated after upgrade from 7 even though I bought the key for the upgrade


    Hello. Not sure how this works but I needed to enter a product key when I used the upgrade option from windows 7 to 10. My version of Win7 was not activated before the upgrade.

    I bought the key and entered and the upgrade to 10 was successful. But now the Activation page reads 'We can't activate Windows on this device because the product key was already used on another device." Error code: 0xC004C008

    But the key wasn't used on another device. It was used on this device. To get the update to work.

    Do I have to buy another product key now?

    Cheers,

    Ben Irvine

    :)
     
    Ben Irvine, Jan 17, 2020
    #1

  2. How to reinstall Windows 10 if my computers used the free upgrade from 7 and 8?

    Will windows 10 still accept the license keys from 7 and 8 now if I reinstall my computer?

    Does Microsoft keep a list of users who upgraded to Win 10 using their 7 and 8 keys so that when users need to reinstall windows 10 the old keys would work?

    Do I need to call in Microsoft to ask them to activate my Windows 10 when I give them my win 7 keys?

    Both computers are laptops. The windows 7 machine had the serial printed on the back, and I needed to enter that when I upgraded to 10. The windows 8 machine had the serial built in inside its boot system so I didn't need to enter the key when I upgraded to 10, but I did manage to write down the keys using a fetcher program.
     
    JebusPrime, Jan 17, 2020
    #2
  3. 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.
     
    TheLostSwede, Jan 17, 2020
    #3
  4. Windows 10 not activated after upgrade from 7 even though I bought the key for the upgrade

    How to reinstall Windows 10 if my computers used the free upgrade from 7 and 8?

    Your ild keys should work but if you registered the key to your online ms persona (email address) it should be tied to your account , install without a key login with your credentials , then activate.
     
    theoneandonlymrk, Jan 17, 2020
    #4
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Windows 10 not activated after upgrade from 7 even though I bought the key for the upgrade

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