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

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  3. Sumit 44,306 Reputation points Volunteer Moderator
    2020-10-03T04:21:31+00:00

    Sorry, I must have missed that. In that case, 20H2 update, the next release is not too far away so I suggest waiting for the same.

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  4. Anonymous
    2020-10-03T04:14:12+00:00

    Isn't that the In-Place upgrade thing that I was told to do before and it didn't quite help? I mean I could try once more (using the setup.exe from the ISO should be good enough right?)

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  5. Sumit 44,306 Reputation points Volunteer Moderator
    2020-10-03T03:15:04+00:00

    I guess it is time that you should do a repair install. It should keep everything and reinstall windows.

    Repair Install Windows 10 with an In-place Upgrade (tenforums.com)

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