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
    2020-09-16T08:57:02+00:00

    Man, i have lot of softwares installed and if i re-install windows fresh from Media creation tool, Every program installed will be wiped out. Is there really no other method to fix this issue?

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  2. Anonymous
    2020-09-15T22:00:54+00:00

    Since you have downloaded the CU from Microsoft Update Catalog, try installing it while your Windows is offline (meaning your actual Windows install is not running at all while installing the Cumulative Update):

    • place the downloaded update in a simple folder at the root of C:, such as C:\UPDATE
    • hold SHIFT while clicking on Restart to restart to a boot menu. Select Command Prompt.

    DISM /Image:C: /Add-Package /PackagePath C:\UPDATE

    • if your normal Windows and Users folders appear on some drive letter other than C: in this mode, use that drive letter instead in the above command

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  3. Anonymous
    2020-09-15T16:00:25+00:00

    I also have the same issue.  Both last month and this month KB4571756 will not install.  It fails with a 0x800f081f error.  I have tried all of the fixes other then Windows reinstall.   https://aka.ms/AA9on8q

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  4. Anonymous
    2020-09-15T15:23:56+00:00

    Nope update still won't install. Dropping a FBH report now.

    Here's the feedback link: https://aka.ms/AA9o8a9

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  5. Sumit 44,306 Reputation points Volunteer Moderator
    2020-09-15T13:31:10+00:00

    I see the patch was reissued yesterday - has anyone tried resetting the update components and then trying again?

    https://support.microsoft.com/en-in/help/4089834/windows-10-troubleshoot-problems-updating

    Also please report the issue to FBH and drop us a link.

    https://answers.microsoft.com/en-us/insider/forum/all/how-to-add-a-feedback-in-the-feedback-hub-and/0c60e72d-d810-40e2-bdc9-50ce5ab3bb9f

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