Windows Update Install Error - 0x800700c1

Question

I've followed many forums and have taken those troubleshooting steps, but no luck. I'm hoping someone can help me directly. I have Windows 11.

Answer 1

Please run this fixlist. It sources the system modules from my GitHub page.

• Download the Farbar Scanner - https://downloads.malwarebytes.com/file/mbst-frst64 (FRST64.exe)
• Download fixlist.txt
• Save Fixlist.txt to the same folder as FRST64.exe.
• Launch the Farbar Scanner tool and click "Fix".
• Restart Windows when prompted.
• Upload the output log file (FixLog.txt) to your OneDrive.

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Note: If Microsoft Edge or Chrome mislabels the Farbar Scanner executable as PUA/malware, choose to keep it by tapping … in the bottom bar, choosing Keep, and then choosing Keep anyway in the dialog that appears.

See this screenshot:https://learn.microsoft.com/en-us/deployedge/media/microsoft-edge-security-download-interruptions/dowload-was-blocked.png. It's a safe tool used in most antimalware forums.

Answer 2

Please upload your CBS logs to OneDrive or GoFile.io and share the link here. To collect the CBS logs, open admin PowerShell and run:

 Compress-Archive C:\Windows\Logs\CBS -f (join-path ([environment]::GetFolderPath('Desktop')) \CBS.zip)

 This creates a file named CBS.zip on your desktop. Share it on OneDrive or GoFile.io and post the link here.

Answer 3

Thanks for the response. Some of the commands are expected to return an error, but not all. Please proceed to the next method (Repair in-place upgrade) and let me know the result. Thank you!

Answer 4

CBS logs as requested below

https://gofile.io/d/F3hYNX

Answer 5

>>Run SFC and DISM

>>If the issue persists, please try performing an in-place upgrade. This will update your computer to the latest version and fix any problems without losing your files. During the upgrade process, make sure to select the option to 'Keep personal files and apps.'