The Microsoft Store cache is corrupt, stopping new licenses from installing.
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
Delete the tokens.dat backup (do not delete current one directly — better to use):
To resolve the "license install failed for license type: 1 result code: 0xc03f6601" error, try the following troubleshooting steps:
The Software Protection Service (sppsvc) manages the download, installation, and enforcement of digital licenses for Windows and applications. If this service stalls, it throws result code 0xc03f6601 . Press Windows Key + R , type services.msc , and press . Scroll down and locate Software Protection . The Microsoft Store cache is corrupt, stopping new
Open the app. Click your profile icon in the top right and ensure your primary purchasing account is signed in.
Knowing whether you have an , Retail , or Volume License is crucial. If you plan to upgrade your motherboard, know that an OEM license will likely require a new purchase, while a Retail license can be transferred to the new hardware.
If you use multiple email addresses, a licensing conflict occurs when the Microsoft Store account does not match the active Xbox profile account.
Sign back into both apps using the exact same email address that owns the game or subscription. Try installing or launching the app again. 5. Re-register All Microsoft Store Apps Core Causes Delete the tokens
If local package manifests are corrupted, re-registering the application framework fixes deep-seated licensing path bugs.
If your system previously had a Volume License (KMS or MAK) installed—common in corporate environments or evaluation versions—and you attempt to install a standard Retail key without properly uninstalling the Volume License, the remnants of the old licensing ticket can conflict with the new one.
slmgr /dli
Paste the following command into the window and press Enter : powershell Scroll down and locate Software Protection
This removes the product key from the local computer. You should see a pop-up confirming the uninstallation.
Windows includes a built-in diagnostic tool specifically mapped to resolve activation and licensing errors. Open ( Windows Key + I ). Navigate to System > Troubleshoot > Other troubleshooters .
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.
Open the . Ensure the exact same Microsoft account is signed in.
If you are trying to activate Windows, update a subscription, or download an app from the Microsoft Store, you may encounter the frustrating error message: accompanied by the hexadecimal result code 0xC03f6601 .
Ignore any red warning lines that appear during the process; this is normal for apps that are currently in use. Once completed, reboot your system. Method 4: Correct Time, Date, and Regional Settings