License Install Failed For License Type: 1 Result Code: 0xc03f6601 [ Fully Tested ]

issues (like upgrading from Windows Pro to Enterprise via Intune) or a lack of a valid digital license on the device. Microsoft Learn Likely Causes Subscription Mismatch

If none of the above works, you may have a (e.g., after replacing a motherboard or SSD). Contact Microsoft support with: issues (like upgrading from Windows Pro to Enterprise

If you upgraded from a trial or volume license to retail, a mismatch often triggers error 0xc03f6601 . you may have a (e.g.

Delete the tokens.dat backup (do not delete current one directly — better to use): " you have identified Vector A.

Look at the line. Does it say "Evaluation"? If yes, you have identified Vector C. If it says "KMS Client Setup Key," you have identified Vector A.