Cumulative update won't install (KB4571756) (Error 0x800f081f)

Anonymous
2020-09-11T07:31:06+00:00

I am running Windows 10 Home 2004 (Build 19041.450). Windows Update notified me that there was a cumulative update available to install (2020-09 Cumulative Update for Windows 10 Version 2004 for x64-based Systems (KB4571756)). When I told it to install the update, it will download and go up to "Installing - 100%" and then just show this error: 

I've tried the following in an attempt to fix the error:

  • Run "sfc /scannow" in an elevated command prompt
  • Run "DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:<Source of clean Windows 10 2004 ISO created using Windows Media Creation Tool> /LimitAccess" in an elevated command prompt
  • Uninstall and reinstall NET framework 3.5 from "Turn Windows features on or off" in Control Panel
  • Manually download the specific update from the Microsoft Update Catalog and install it
  • Stop the Windows Update service and delete the Windows Update cache located in "%SystemRoot%\SoftwareDistrubution", then restart the service

Obviously, none of these worked so I'm looking for any other solutions to this problem. Any help is appreciated.

Windows for home | Windows 10 | Windows update

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  1. Sumit 44,306 Reputation points Volunteer Moderator
    2020-10-03T04:27:32+00:00

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  2. Anonymous
    2020-10-03T04:30:56+00:00

    I was thinking the same, but I'd like to give the repair install one more chance.

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  3. Anonymous
    2020-10-03T04:35:26+00:00

    Windows Update log here

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  4. Anonymous
    2020-10-03T05:51:01+00:00

    OHHKAY. LOOKS LIKE I LUCKED OUT. SECOND ATTEMPT AT IN PLACE UPGRADE HAS FIXED THE ISSUE AND I WAS ABLE TO UPDATE TO THE OCTOBER PATCH PREVIEW. I HAVE NO IDEA HOW BUT IT WORKED.

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  5. Anonymous
    2020-10-03T09:58:12+00:00

    I understand your frustration. 

    In August another update failed to install in a similar way and there were several retries per day. I stopped windows update waiting for the September patch tuesday. 

    Now i am using a Microsoft tool to hide this offending update. I think they developped this tool for cases just like this. This is the second month in a row now with failing updates.

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