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
    2020-09-21T18:04:17+00:00

    Everyone, try with this command:

    DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:X:\sources\sxs

    If you want to be more specific follow the steps on this video

    If I achieve anything I'll post back

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  2. Anonymous
    2020-09-21T16:20:28+00:00

    Thank you I will keep an eye out.

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  3. Sumit 44,306 Reputation points Volunteer Moderator
    2020-09-21T16:14:40+00:00

    I understand your concerns 😅

    Microsoft says you should only try to install it if you were having issues with the previous updates or looking for a specific fix mentioned in the Release notes. Not to worry, they can be uninstalled if it ends up with issues.

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  4. Sumit 44,306 Reputation points Volunteer Moderator
    2020-09-21T14:38:58+00:00

    The next patch(also called "C" release) should be available for 2004 hopefully this week. C patches are a preview of the next month Patch Tuesday. 

    The preview update for Windows 10, version 2004 will be available in the near term. For more information on the different types of monthly quality updates, see our Windows 10 update servicing cadence primer. Follow @WindowsUpdate for the latest on the availability of this release.

    https://docs.microsoft.com/en-us/windows/release-information/windows-message-center

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  5. Anonymous
    2020-09-19T19:01:49+00:00

    i have the same issue and absolutely none of the random guesses from microsoft on this thread have worked.

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