In either case, whatever be the exact cause of the error, the solution is to rebuild the Tokens.dat or Activation Tokens file on the system, irrespective of whether it got corrupt or went missing, or wasn’t successfully upgraded. The Software Licensing Service reported that the call has failed because the value for the input key was not found. Sometimes a different error message pops up: The problem surfaces when you click the watermark at the bottom-right of the screen to activate Windows. Sometimes the error occurs during first time activation, and sometimes during a major upgrade in which the activation status is lost. Well, the Windows 10 Activation error 0xC004F012 occurs because of missing or corrupt licensing repository. You might be wondering what caused this error. If you are looking for an effective solution to this error, perhaps some of our suggestions will help you. One such Windows 10 Activation error comes with an error code 0xC004F012. At times, it is difficult to activate Windows OS.
