License Install Failed For License Type: 1 Result Code: 0xc03f6601 May 2026

The error message "License install failed for license type: 1 Result code: 0xC03F6601" typically appears in the Windows Event Viewer (under Microsoft-Client-Licensing-Platform/Admin

Step 5: Re-register Office licenses:

Are you attempting to activate a personal device or a work device managed by an organization? Subscription activation Issues and the Windows Store API The error message "License install failed for license

You can manually trigger the licensing service to refresh using the Software Licensing Management Tool (slmgr). and run the following to see the current

and run the following to see the current license status and trigger a manual activation attempt: Check status: slmgr /dli Manual activation: slmgr /ato Fix Corrupted System Files The error message "License install failed for license

Expired or revoked license

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

Step 6: Restart your PC and try activating Office again.