Windows 10: Brand new Windows 10 product key showing "Already used" 0xC004C008 Error on brand new built PC

Discus and support Brand new Windows 10 product key showing "Already used" 0xC004C008 Error on brand new built PC in Windows 10 Updates and Activation to solve the problem; Hello! I am a new system user who has just built my first PC.I purchased a Windows 10 Home license from Microsoft brand new, and used the USB stick to... Discussion in 'Windows 10 Updates and Activation' started by MagicalDoshDosh, Nov 23, 2022 at 5:37 PM.

  1. Brand new Windows 10 product key showing "Already used" 0xC004C008 Error on brand new built PC


    Hello! I am a new system user who has just built my first PC.I purchased a Windows 10 Home license from Microsoft brand new, and used the USB stick to install windows to my fresh system. Install went fine, I was able to change my personalization options briefly. But after a restart, Windows asked for the activation key and is returning the "0xC004C008" error that says it's activated on another computer. This is a brand new system and a brand new key. I don't understand how it could be activated on another computer. My Microsoft account only shows one system: the one it's installed on right now

    :)
     
    MagicalDoshDosh, Nov 23, 2022 at 5:37 PM
    #1

  2. Brand New windows key won't work.

    I recently bought a windows product key from amazon for my newly built pc. I installed windows, inputted the product key.

    All seemed fine. A day later it is prompting me to input the product key and when I do it is saying the key has been used on another computer. Baring in mind I bought this brand new from amazon.

    Any suggestions?
     
    TheCrazedPCFanatic, Nov 23, 2022 at 5:38 PM
    #2
  3. Error code 0xC004C008

    Hi,

    The error code 0xC004C008 means that the product key that you are trying to use is already activated on a different device. For us to effectively assist you, can you confirm if you have already activated the product key on another device
    before building a new computer? Or was it purchased brand new the same time that you have built the new computer?

    Meanwhile, we suggest checking this link
    Get help with Windows activation errors
    for further details regarding the error code that you are receiving.

    Let us know if there are other concerns.
     
    Jomel_Santos, Nov 23, 2022 at 5:38 PM
    #3
  4. Brand new Windows 10 product key showing "Already used" 0xC004C008 Error on brand new built PC

    brand new windows 10 activation no working

    I have recently built a new computer. I purchased a brand new usb copy of windows 10 from amazon and I am getting an error message that my activation key is invalid. Is it possible that it is because of an old windows account recognizing an old product
    key from a previous computer? I am just very confused on why this brand new copy of windows is giving me trouble.
     
    KrisThornton, Nov 23, 2022 at 5:38 PM
    #4
Thema:

Brand new Windows 10 product key showing "Already used" 0xC004C008 Error on brand new built PC

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