License Install Failed For License Type: 1 Result Code: 0xc03f6601 〈DELUXE – 2026〉

This error is part of the . 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:

Re-register Office licenses:

The licensing engine received a request to install a retail-style license, but the validation checks failed because the license data does not match the current state or edition of the installed operating system.

If none of the above works, you may have a (e.g., after replacing a motherboard or SSD). Contact Microsoft support with: This error is part of the

Is this error happening during a or when launching a specific Microsoft Store app ?

Microsoft provides an automated tool to fix license issues.

If the error persists after these steps, verify that your computer's are completely accurate under Settings, as a time desynchronization will cause Microsoft's secure licensing servers to reject validation requests. Additionally, temporarily disable any third-party VPNs or strict firewalls that could be blocking outbound traffic to ://microsoft.com . To help narrow down the exact cause, let me know: If none of the above works, you may have a (e

The error typically appears in the Client-Licensing event logs when Windows or a Store app fails to validate a digital license . In most cases, "License Type: 1" refers to the core OS activation or a primary application subscription, such as an upgrade from Windows Pro to Windows Enterprise. Core Causes

If you’ve seen the error “license install failed for license type: 1 result code: 0xc03f6601” while installing or activating software, it usually means the license installer encountered a validation or permission problem. Below is a practical guide to diagnose and fix the issue, plus best practices to avoid it in the future.

Contact vendor support if:

Run the following command to see detailed license information:

Scroll down to find (or Windows Update if Store Apps isn't listed) and click Run . Follow the on-screen instructions and restart your PC. Method 2: Reset the Microsoft Store Cache (WSReset)

Attempting to activate an edition (like Enterprise) on a device that only has an OEM license for a different edition (like Home or Pro). If the error persists after these steps, verify