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

Run as Administrator:

slmgr /dlv

Look for "License Status" and "License Type".

Conflicting software is a known cause of 0xc03f6601. Run as Administrator: slmgr /dlv

The error message License install failed for license type: 1 result code: 0xc03f6601 is a specific and prevalent issue occurring within the Microsoft Windows ecosystem, predominantly affecting Windows Server environments. It signals a failure in the Software Licensing User Interface (slui.exe) or the Software Protection Service (sppsvc) when attempting to register a license certificate (typically a Volume License) with the Software Licensing Platform (SLP).

This review provides a comprehensive analysis of the error's etymology, technical underpinnings, root causes, and remediation strategies. Look for "License Status" and "License Type"

Applies to: Microsoft Office (2016, 2019, 2021, Microsoft 365), Windows 10/11

If you’ve recently tried to activate Microsoft Office and encountered the error message: Applies to: Microsoft Office (2016, 2019, 2021, Microsoft

“License install failed for license type: 1 result code: 0xc03f6601”

you’re not alone. This cryptic error typically appears during the licensing or activation phase, often after reinstalling Windows, resetting your PC, or making significant hardware changes. Below, we break down what this error means and how to fix it.