I am getting an error 80070306 when installing window update 25H2

Error 80070306 typically indicates an issue with the installation of updates on Windows. Here are some steps you can take to try to resolve this issue:

1. Check Disk Space: Ensure that you have enough disk space available on your device. Sometimes, insufficient space can prevent updates from installing.
2. Run Windows Update Troubleshooter: Although you mentioned you have run it several times, it might be worth trying again after ensuring that your system is fully updated. You can access this through Settings > Update & Security > Troubleshoot > Additional troubleshooters > Windows Update.
3. Reset Windows Update Components: You can manually reset the Windows Update components. This involves stopping the Windows Update service, renaming the SoftwareDistribution and Catroot2 folders, and then restarting the service. Here’s how:
   • Open Command Prompt as an administrator.
   • Run the following commands one by one:

          net stop wuauserv
          net stop cryptSvc
          net stop bits
          net stop msiserver
          ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
          ren C:\Windows\System32\catroot2 Catroot2.old
          net start wuauserv
          net start cryptSvc
          net start bits
          net start msiserver
     

4. Check for Corrupted System Files: Run the System File Checker tool to repair missing or corrupted system files. Open Command Prompt as an administrator and run:

      sfc /scannow
   

5. Manual Installation: If the update continues to fail, you can try to download the update manually from the Microsoft Update Catalog and install it.
6. Check for Known Issues: Sometimes, specific updates have known issues. Check the Windows release health page for any notifications regarding version 25H2 that might relate to your problem.

If none of these steps resolve the issue, you may want to consider reaching out to Microsoft Support for further assistance.

References:

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

Hi, I'm Bernard, a fellow Windows user. I'm happy to help!

I understand the issue you have. There is nothing to worry about. I am here to assist. If the issue persists after doing the steps provided by Q&A Assist, I suggest doing an in-place upgrade, wherein it will update the device to the latest version and repair all issues without deleting any files.

Kindly follow the steps from this link:

https://learn.microsoft.com/en-us/answers/questions/4252110/how-to-run-in-place-upgrade-in-windows-11