Windows 10: Error code: 0xC004C003, when using Windows 10 product key

Discus and support Error code: 0xC004C003, when using Windows 10 product key in Windows 10 Installation and Upgrade to solve the problem; hey i just bought a windows 10 key, and it says the key doesnt work. i have software from the company that build my pc but where my old product key was... Discussion in 'Windows 10 Installation and Upgrade' started by gabrielfillingsnes, Jan 8, 2020.

  1. Error code: 0xC004C003, when using Windows 10 product key


    hey i just bought a windows 10 key, and it says the key doesnt work. i have software from the company that build my pc but where my old product key was on the computer got removed one time sent it to repair. so i bought a new code so i could upgrade to windows 10, so i can run my games trough directx 12. now i have the problem that the key wont activate. the error code is: 0xC004C003


    ***Original title: windows 10 key wont work on my windows 8.1***

    :)
     
    gabrielfillingsnes, Jan 8, 2020
    #1
  2. AllanP Win User

    Activation fails Error code: 0xC004C003


    I had upgraded from W8.1 and Windows 10 was activated. I was under the impression that I didn't need a product key and that my PC would be recognized after doing a clean install. Now I have W10 installed fresh, but get the error code: Error code: 0xC004C003
     
    AllanP, Jan 8, 2020
    #2
  3. Superfly Win User
    Error code: 0xC004C003


    That error code indicates that the key is not valid... make sure you have the correct key for the edition you have installed and activate as Slarty has linked.
     
    Superfly, Jan 8, 2020
    #3
  4. Error code: 0xC004C003, when using Windows 10 product key

    Activation fails Error code: 0xC004C003


    I'm experiencing the same problem like you, upgraded my windows 7 professional PC since july 29th and can't activate it.
    Product key blocked. Error code: 0xC004C003, several calls to microsoft haven't helped all i keep getting from the agents on phone is to wait 24-48 hours.
    It will be two weeks on 12th august still no resolution by microsoft
     
    fruswinuser, Jan 8, 2020
    #4
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Error code: 0xC004C003, when using Windows 10 product key

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