Windows 11 Insider Preview Quality Update (26220.7271) Erro de instalação - 0x800f0991

Question

I try to install this update several times without success.

Can you help me?

Answer 1

The error code 0x800f0991 typically indicates that there is an issue with the update installation process, often related to missing components or dependencies. Here are some steps you can take to troubleshoot and potentially resolve the issue:

1. Check for Pending Updates: Ensure that there are no pending updates that need to be installed before you can install the new update. Go to Settings > Windows Update and check for updates.
2. Run the Windows Update Troubleshooter: This built-in tool can help identify and fix problems with Windows Update. You can find it under Settings > Update & Security > Troubleshoot > Additional troubleshooters > Windows Update.
3. Reset Windows Update Components: Sometimes, resetting the Windows Update components can resolve installation issues. You can do this through the Command Prompt with administrative privileges by running the following commands:
   • net stop wuauserv
   • net stop cryptSvc
   • net stop bits
   • net stop msiserver
   • net start wuauserv
   • net start cryptSvc
   • net start bits
   • net start msiserver
4. Check Disk Space: Ensure that you have enough disk space available on your device, as insufficient space can prevent updates from installing.
5. Use the Windows Update Assistant: If the issue persists, you can try using the Windows Update Assistant to manually install the update. This tool can help you get the latest version of Windows 11.

If you continue to experience issues, consider checking the Windows Insider Program's flight blog posts for any known issues related to the specific build you are trying to install.

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References:

• Troubleshooting
• Windows 11, version 25H2 known issues and notifications