How to fix this error Install error - 0x80070306 while updating windows KBC5070311

Question

I am trying to download and install the windows version KBC5070311 . But I am seeing the error Install error - 0x80070306. Please help me fix this issue

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Moved from: System Center Service Manager

Answer 1

The error code 0x80070306 typically indicates a problem with the installation process, often related to missing files or corruption in the update components. Here are some steps you can take to resolve this issue:

1. Run Windows Update Troubleshooter: This built-in tool can help identify and fix issues with Windows Update. You can find it in Settings under Update & Security > Troubleshoot > Additional troubleshooters > Windows Update.
2. Check for Corrupted Files: Use the System File Checker (SFC) to scan for and repair corrupted system files. Open Command Prompt as an administrator and run the command:

sfc /scannow

This process may take some time, and you should restart your computer afterward.

3. **Repair the Component Store**: Use the DISM tool to repair the Windows image. In an elevated Command Prompt, run:

Dism.exe /Online /Cleanup-Image /RestoreHealth

After this command completes, run the SFC command again.

4. Ensure Sufficient Disk Space: Make sure you have enough disk space available for the update. You can check this by going to Settings > System > Storage.
5. Manually Download the Update: If the issue persists, you can manually download the update from the Microsoft Update Catalog using the KB number associated with the update.
6. Check CBS.log: If the problem continues, you may want to check the CBS.log file located at C:\Windows\Logs\CBS\CBS.log for more detailed error messages that can help identify the root cause.

If these steps do not resolve the issue, consider reaching out to Microsoft Support for further assistance.

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References:

• Troubleshoot Windows Update installation error 0x800f0831 CBS_E_STORE_CORRUPTION
• Windows Update common errors and mitigation

Answer 2

Hi, good day!

Microsoft has begun implementing and releasing Optional preview updates that are typically released on the 3rd or 4th week of every month. These updates allow admins to test the patch before its mandatory launch on Patch Tuesday (2nd week of the month). If you are not experiencing any issues with your system, there is no need to install the preview update.

To prevent optional preview updates from appearing and installing, press Start > Settings > Update & Security > Windows Update. Toggle off "Get the latest updates as soon as they're available" option. Restart your computer.