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

The error code 0xC03F6601 typically indicates a failure in the Client-Licensing Platform

(CLiP) when Windows or the Microsoft Store fails to acquire or install a valid license for your device . This is often tied to subscription-based activation

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

: The device is trying to activate a version (like Enterprise) that isn't properly assigned to the user or device in Microsoft Entra ID (Azure AD). Compliance Issues

: The device may need a reboot to apply security policies (like BitLocker) before it is considered "compliant" for a license upgrade. Store API Failures

: Temporary communication issues between your PC and the Microsoft Store licensing servers. Microsoft Learn Steps to Resolve Run the Activation Troubleshooter Start > Settings > System > Activation and select Troubleshoot

. This can often detect if a digital license for a different edition is available. Reset the Microsoft Store Cache Windows Key + R wsreset.exe

Wait for the command to finish and the Store to open automatically. Check Device Compliance (For Business/Enterprise Users) The error code 0xC03F6601 typically indicates a failure

If you are on a work-managed device, ensure your device is fully updated and compliant. A simple

is often required to trigger the final licensing check after enrollment. Verify via Command Line Command Prompt (Admin)

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

If the licensing platform service itself is corrupted, run a system scan: Command Prompt (Admin) sfc /scannow Microsoft Learn Is this error appearing specifically after a hardware change or while trying to install a specific from the Microsoft Store?

Troubleshooting Error 0xC03F6601: License Install Failed If you have stumbled across "License install failed for license type: 1 Result code: 0xC03F6601" in your Event Viewer or Intune logs, you are likely dealing with a frustrating Windows activation or Microsoft Store subscription issue. This error often appears when your system tries—and fails—to upgrade its license, such as moving from Windows Pro to Enterprise via a subscription. What Does This Error Mean?

This error is part of the Microsoft-Client-Licensing-Platform. It typically signals a breakdown in the communication between your device and the Windows Store API (often the Universal Store API used for subscription-based activation). Common triggers include:

Subscription Mismatch: Your account has a license (like Windows Enterprise), but the system is struggling to "apply" it over your existing Pro installation. Press Win + R , type regedit , press Enter

Network/Connectivity Issues: The device cannot reach the Microsoft Licensing Service to verify the seat.

Policy Conflicts: Intune or MDM configurations (like BitLocker requirements) may be preventing the license upgrade until specific compliance standards are met. How to Fix Error 0xC03F6601 1. Run the Activation Troubleshooter

Before trying complex command-line fixes, let Windows try to self-heal. Go to Settings > Update & Security > Activation. Select Troubleshoot.

If a valid digital license is found for a different edition, the troubleshooter will often prompt you to correct the edition automatically. 2. Reset the Microsoft Store Cache

Since this error often stems from the Store's licensing API, clearing its cache can force a fresh handshake. Press Windows Key + R. Type wsreset.exe and hit Enter.

A blank command prompt will appear; wait for it to close and the Store to open automatically. 3. Force Activation via Command Prompt

You can manually trigger the licensing service to refresh using the Software Licensing Management Tool (slmgr). or Microsoft account. Alternatively

5. Registry Cleanup (Advanced Users)

Warning: Editing the registry incorrectly can damage Windows.

  1. Press Win + R, type regedit, press Enter.
  2. Navigate to: 
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\Configuration
  3. Look for any keys named ProductReleaseIds or LicensingType. Back them up, then delete them.
  4. Restart and reactivate.

Solution 2: Repairing the Token Store (Most Effective for Vector B)

If permissions are the issue, the licensing repository must be reset.

  1. Stop the Software Protection Service: 
    net stop sppsvc
  2. Navigate to C:\Windows\System32\spp\store\2.0.
  3. Rename the folder 2.0 to 2.0.old. (Note: This forces Windows to rebuild the licensing store upon restart. Do not delete, just rename, so you can revert if necessary.)
  4. Start the service: 
    net start sppsvc
  5. Attempt key installation again.

Step-by-Step Fixes

Try these solutions in order. Most users will succeed by step 3.

Step 2: Check for Existing License Type Conflicts

Run the following command to see detailed license information:

slmgr /dlv all

Scroll through the output. Look for an existing entry where License Type might already be set to Retail or a conflicting value.

Action: If a conflicting license exists, you may need to clear the licensing state (see Step 4).

What Does Error 0xc03f6601 Mean?

This error indicates that Microsoft Office attempted to install a license (type 1 refers to a volume or device-based license), but the process failed. The hexadecimal code 0xc03f6601 translates to a license binding mismatch or corrupted licensing store.

In plain English: Office found a license on your computer, but it doesn’t match the current installation, product key, or Microsoft account. Alternatively, a previous license is stuck in the system, blocking the new one.