Windows 10: Activation Error 0xC004FC03 product key used on another device. PC locked up. Phone number...

Discus and support Activation Error 0xC004FC03 product key used on another device. PC locked up. Phone number... in AntiVirus, Firewalls and System Security to solve the problem; Activation Error 0xC004FC03 product key used on another device. PC locked up. Phone number does not respond.... Discussion in 'AntiVirus, Firewalls and System Security' started by KathrynKress, Feb 22, 2020.

  1. Activation Error 0xC004FC03 product key used on another device. PC locked up. Phone number...


    Activation Error 0xC004FC03 product key used on another device. PC locked up. Phone number does not respond.

    :)
     
    KathrynKress, Feb 22, 2020
    #1
  2. Ben Voigt Win User

    Is it possible to use a Windows 10 product key to activate a Windows 7 installation?

    According to Microsoft, you can't use your Windows 10 keys. You will have to call Activation Support, provide proof that you have a license with downgrade rights, and they will provide a response to the activation challenge that will result in a one-time activation of an install.

    Source: Device Partner Center
     
    Ben Voigt, Feb 22, 2020
    #2
  3. Microsofts Activation services phone #?

    So I had an old rig that was running a RETAIL version of Win XP Home. Well the thing died. I want to use the product key from that old machine to do a win 7 upgrade, however, I cannot seem to find Microsoft's support number anywhere on their site, instead it redirects me to a page and here's what it says:

    Well guess freakin what, THE COMPUTER IS DEAD, THEREFORE I CAN NOT DO ANY OF THOSE DAMN THINGS!!!!!!! *Bang Head :banghead:

    This is seriously getting on my nerves!

    Even googling it takes me to the same place. Does anyone have the number for their "Activation services" department?
     
    BlackOmega, Feb 22, 2020
    #3
  4. RK1997 Win User

    Activation Error 0xC004FC03 product key used on another device. PC locked up. Phone number...

    Using the current device's product key on my another device.

    Hello,
    I tried this before. On newer PC, activation was unsuccessful.
     
    RK1997, Feb 22, 2020
    #4
Thema:

Activation Error 0xC004FC03 product key used on another device. PC locked up. Phone number...

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