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Error code

0xC004F06C

The Key Management Service (KMS) determined that the request timestamp is invalid.
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) determined that the request timestamp is invalid.

What this means

The system clocks on the client and the KMS host differ by too much, so the host refused this activation request. This is not a product key problem.

Common causes

  • The client system time is wrong.
  • The KMS host time is wrong.
  • The device has been offline for a long time, so the time has not synced.
Do this first

Compare the client and host clocks, and check that the difference is within a reasonable range.

What to do next

  1. 1Sync the system time on the client, then try again.
  2. 2Ask IT to check the time service on the KMS host.
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

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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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