How to fix Windows 11, version 25H2 Install error - 0xc1900101

Question

I have not been able to successfully install a Windows update since version 23H2 in January. I get the same install error every time. Please advise.

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Moved from: Windows for business | Windows 365 Business

Answer 1

To fix the Windows 11, version 25H2 install error 0xc1900101, you can try the following troubleshooting steps:

1. Check for Compatibility: Ensure that your device meets the minimum system requirements for Windows 11, version 25H2.
2. Update Drivers: Outdated or incompatible drivers can cause installation errors. Make sure all your device drivers are up to date, especially graphics and network drivers.
3. Free Up Disk Space: Ensure that you have enough disk space for the update. Windows updates require sufficient space to install.
4. Disable Antivirus Software: Sometimes, third-party antivirus software can interfere with the installation. Temporarily disable it and try the update again.
5. Run Windows Update Troubleshooter: Go to Settings > Update & Security > Troubleshoot > Additional troubleshooters, and run the Windows Update troubleshooter to identify and fix issues.
6. Perform a Clean Boot: This helps eliminate software conflicts. You can perform a clean boot by disabling all non-Microsoft services and startup items.
7. Use the Media Creation Tool: If the above steps do not work, you can use the Media Creation Tool to create installation media and perform an upgrade.

If the issue persists after trying these steps, consider checking the Microsoft Support Community for additional help or reporting the issue through the Feedback Hub app.

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References:

• Windows 11, version 25H2 known issues and notifications
• Resolved issues in Windows 11, version 25H2

Answer 2

Hi,

1. Have you already tried the suggested steps recommended by the AI Assist above?
2. In the search bar, type Winver and hit Enter.

Please share a screenshot of that window.

3. Go to Settings > System > Windows Update.

Take a screenshot and share it here.

Do not include any personal information.

4. Try running the PC Health Check tool: https://aka.ms/GetPCHealthCheckApp

Click 'check now' button then share a screenshot of the result.