after upgrade windows 10 cannot activate Error code: 0xC004F034

View Poll Results: can u activate windows 10?

Voters
49. You may not vote on this poll
  • Yes

    25 51.02%
  • No

    24 48.98%
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  1. Posts : 19
    Windows 10
       #201

    Brink said:
    Can I reinstall Windows 10 on my computer after upgrading with free upgrade?

    Once you’ve upgraded to Windows 10 using the free upgrade offer, you will be able to reinstall, including a clean install, on the same device. You won’t need a product key for re-activations on the same hardware. If you make a meaningful change to your hardware, you may need to contact customer support to help with activation. You’ll also be able to create your own installation media like a USB drive or DVD, and use that to upgrade your device or reinstall after you’ve upgraded.
    Did exactly as mentioned, with an activated Win 10, then did the clean install, same hardware, no changes... now I can't activate. And I don't have an Activate button available, only error: 0xC004C003, which seems to force me to go back to win 8 and try again? :/
      My Computer


  2. Posts : 2
    win 10 enterprise
       #202

    Win10 Can't activate


    myuption said:
    Did exactly as mentioned, with an activated Win 10, then did the clean install, same hardware, no changes... now I can't activate. And I don't have an Activate button available, only error: 0xC004C003, which seems to force me to go back to win 8 and try again? :/
    When you have win8 activated and want to WIN 10. You have to upgrade. Can't do with clean install when go to WIN10. The activated license on WIN8 have to generate to WIN10 license. So you will get WIN10 activated.
    Accept you have bought new license for WIN10. you can do clean install then install license for WIN10.
      My Computer


  3. Posts : 19
    Windows 10
       #203

    Seems to be the case, it's unfortunate, I waited as Microsoft guys told me via telephone, but in the end I'll have to reinstall Win 8 first.

    Thanks
      My Computer


  4. Posts : 46
    Windows 10
       #204

    So I just had my own experience with this, I was using Windows 10 Insider Preview 10532, now I only went onto the insider program because inputmapper wasn't working right with Windows 10 retail, so anyway, I am upgraded from a Windows 8 Pro key.

    I changed my motherboard yesterday and of course it then said my windows wasn't activated, in the activation screen I was seeing the usual stuff, this error message and that my key was blocked blah blah. Already read this and other threads so fully expected I had to go back to win 8 then once activated on that upgrade to win 10, real pain in the you know what! Did an MS support chat this morning, 40+ mins wasted to get the same answers, need to roll back to win8, they promise I won't lose my settings and programs, blah blah, tried to do that but got a couple of error messages that stopped me, fortunately! So I remembered that last night I'd read in here about a new insider build 10558, I had left that downloading from a "source" so figuring I had nothing to lose I installed that, it upgraded to it no problem, but of course said I wasn't activated, now the activation screen is a bit different in this one but same problem, so I click the button to enter a new key, question is, what key to use? I don't have a windows 10 key obviously, I have an email with 5 of my windows 8 keys, 3 windows 8 pro and 2 that were converted to media center keys, entered one of the media center keys expecting it to spit it out and laugh at me, but no it accepted the key, I clicked activate and it said I was activated, off a win 8 key, so did MS change their activation system with this new win10 insider build to accept win 8 keys????
      My Computer


  5. Posts : 19
    Windows 10
       #205

    Probably because you have separate windows keys... mine is OEM, haven't had time to redo installation. I will try this week and see what happens.
      My Computer


  6. Posts : 18,424
    Windows 11 Pro
       #206

    Placebo said:
    I clicked activate and it said I was activated, off a win 8 key, so did MS change their activation system with this new win10 insider build to accept win 8 keys????
    Microsoft changed their activation system with build 10586.0, the November update, to accept Windows 7/8/8.1 product keys.

    Now You can Activate Windows 10 Using Windows 7, 8 or 8.1 Product Key - AskVG

    [Review] Whats New in Windows 10 November Update Build 10586 - AskVG

    Apart from above mentioned changes and new additions, following are some more new features and changes which are worth to mention:
    ◦Now Windows 10 can be activated using Windows 7/8/8.1 product key (Check This)
      My Computer


 

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