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Error code

0xC004F039

The Key Management Service (KMS) is not enabled.
WindowsKMS clientChecked 2026-10-20
Official message
Microsoft original
The Software Protection Service reported that the computer could not be activated. The Key Management Service (KMS) is not enabled.

What this means

KMS is not enabled on the target host, so the client cannot finish activation.

Common causes

  • The KMS role is not installed or not enabled on the host.
  • The KMS service on the host is not running.
Do this first

Ask IT to check the KMS service state on the host.

What to do next

  1. 1Ask an administrator to enable and start the KMS service.
Continue diagnosis from this code

Take what you know into the KMS diagnosis. It will ask a few more questions to narrow this down.

Start the diagnosis

Sources

Related articles

About this data
The meaning and the original message come from the documents listed above. The same error code can have more than one cause. This site gives an order of checks. It does not decide your exact situation from the code alone.
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