Windows 10: Windows not activated after clean install Solved

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  1.    29 Jul 2015 #1

    Windows not activated after clean install

    Hello, I upgraded my Windows 7 to Windows 10 using the windows updater. After windows 10 was installed, I decided to download this Windows 10 and chose the USB option. I booted into my USB and when selecting the partition, I deleted every partition that was there (even the system). Now I am on windows 10 with no activation. I have the Windows 7 product key but it does not work.

    P.S its not pirated Windows 7. I got it from Dream spark (on the hub) students saving.
      My ComputerSystem Spec

  2. Posts : 3
    Windows 10 Pro 64-bit
       29 Jul 2015 #2

    my brother just graduated college so I bought a few windows 7 disk thru his school and I cannot activate 10 with the 7 key either. I read somewhere that you had to be on windows 7 and upgrade to 10. you cannot do a clean install cause your windows 7 key will not work with the windows 10 activator. its a nightmare believe ne wish I knew this before I whipped my hard drive last night lol guess ill just stay on 10 till it boots me off for not activating then ill reinstall 7 and go from there.
      My ComputerSystem Spec

  3.    29 Jul 2015 #3

    I got the same issue as you. Upgraded from Windows 8.1 to Windows 10 and it activated by itself without any issues.

    I recently bought another SSD, so I decided to do a fresh install on the new drive. I did the exact same as you, I booted into the Windows 10 install media, deleted every partition and then selected to install on my new SSD. However, after the installation it won't activate. I followed this guide: How to Do a Clean Install of Windows 10

    Now I guess I'll have to install Windows 8.1 again and then upgrade from there.. :I
      My ComputerSystem Spec

  4.    29 Jul 2015 #4

    ya i successfully upgraded my 7 ultimate to 10 pro, but now its saying my key is blocked after i did a clean install even thoue i performed that initial upgrade using the GWX app

    well this wont be of much help but i was working with Microsoft tech support, and they only suggested me to ether wait 3 days to see if a update fixes it, or reinstall windows 7 ultimate and then upgrading again from there, and just Not do the clean install of 10

    they were saying its a error on their computers and they were remote assisting my computer and there was nothing they could do
    Last edited by animedan; 29 Jul 2015 at 13:52.
      My ComputerSystem Spec

  5.    29 Jul 2015 #5

    Same problem here...
    Error 0xC004C003
      My ComputerSystem Spec

  6. Posts : 7
    Windows 10 Home 64-bit
       29 Jul 2015 #6

    Same problem here, clean installed from legal Windows 7 HP, but activation key doesn`t work. Error code is 0xC004F050

    edit: could it have to do something from MediaCreationTool where it asked edition of windows? (e.g. Windows 10 Home and Windows 10 Home N)
      My ComputerSystem Spec

  7. Brink's Avatar
    Posts : 33,148
    64-bit Windows 10 Pro build 18262
       29 Jul 2015 #7


    You would need to either upgrade using the Media Creation Tool or via the free offer on an activated Windows 7 or 8.1 instead.
      My ComputersSystem Spec

  8. Posts : 7
    Windows 10 Home 64-bit
       29 Jul 2015 #8

    Brink said: View Post

    You would need to either upgrade using the Media Creation Tool or via the free offer on an activated Windows 7 or 8.1 instead.
    Can you please confirm, I need to "Upgrade" from previous activated copy of windows (win7,8) in order to have win10 activated.
    So I cannot clean install, format drives etc. and boot USB win10 which was created by MediaCreationTool?
      My ComputerSystem Spec

  9.    29 Jul 2015 #9

    your supose to beable to do a clean install AFTER you first did a upgrade from 7 or 8 to 10, but that does not work, untill microsoft fixes a "key" issue
      My ComputerSystem Spec

  10. Brink's Avatar
    Posts : 33,148
    64-bit Windows 10 Pro build 18262
       29 Jul 2015 #10

    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 or Media Creation Tool on an activated Windows 7 or 8.1 PC, 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.
      My ComputersSystem Spec

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