The error code 0xC004F074 indicates that the Key Management Service (KMS) is unavailable when trying to activate Windows. This issue can occur for several reasons:
- KMS Host Service: The Software Protection Platform Service (sppsvc) on the KMS host may not be running. You should check if this service is active on the KMS server.
- Networking Issues: There might be networking problems between your device (the KMS client) and the KMS host server. Ensure that TCP port 1688 is open and not blocked by any firewall.
- DNS Configuration: Verify that the KMS host server record in your Domain Name System (DNS) is correct. You can check the
_VLMCSSRV record in the DNS management console to ensure it points to the right KMS host. - Time Synchronization: Ensure that the system time on your device is synchronized with the KMS host. Significant time differences can prevent activation.
To resolve the issue, you can follow these steps:
- Check if the sppsvc service is running on the KMS host.
- Open port 1688 on any firewalls between the client and the KMS host.
- Verify the KMS DNS record and make sure it points to the correct KMS server.
- Synchronize the time on your device with the KMS host using a Network Time Protocol (NTP) source.
If the problem persists, you may want to consult the Application Event Log for more specific error messages related to the activation attempt.