KMS activation Error code 0xC004C008

0xC004C008
The activation server determined that the specified product key could not be used.

Cause

This issue may occur if the KMS key has exceeded the activation limit. KMS keys will activate up to 10 times on six different computers. This issue may also occur if the user uses a pirated key and then tries to change the pirated key to a real activation key.

Resolution

Write a mail to kmsadd@microsoft.com with the following information.

  • Organization
  • License ID
  • Product name
  • Your contact information