License Install Failed For License Type: 1 Result Code: 0xc03f6601

The error code 0xc03f6601 combined with "license install failed for license type: 1" typically indicates a Windows licensing or activation failure, often related to Volume Licensing (especially KMS or MAK keys) or Windows Store / digital license issues.

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

dism /online /get-currentedition

5. Use Microsoft’s Activation Troubleshooter

• Go to Settings → Update & Security → Activation → Troubleshoot

1. Retrieve the KMS Client Setup Key for the target edition (e.g., Standard, Datacenter) from Microsoft's official documentation.
2. Run:

   dism /online /set-edition:ServerStandard /productkey:<KMS_CLIENT_KEY> /accepteula
   

   (Replace ServerStandard with ServerDatacenter if applicable).
3. Restart the server.
4. Once the edition matches your license, install your MAK key using slmgr.vbs /ipk.

, especially during subscription-based activations like Windows Enterprise. Common Causes Subscription Activation Lag The error code 0xc03f6601 combined with "license install