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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 43,251 Reputation points Volunteer Moderator
    2020-09-11T12:46:30+00:00

    Hi,

    The first step would be to try resetting Windows updates using an automatic script. See:

    http://www.yourwindowsguide.com/2015/12/windows-update-complete-reset-in.html

    Make sure you run the script as an administrator.

    Try reinstalling manually then.

    3 people found this answer helpful.
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  2. Anonymous
    2020-09-13T11:45:39+00:00

    I did mention in my post that I downloaded the update from the Microsoft Update Catalog (the MSU that is). And no, it didn't work as mentioned before.

    2 people found this answer helpful.
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  3. Anonymous
    2020-09-13T11:38:26+00:00

    Hi,

    I've had the same problem, but in addition to the op I downloaded the msu file to install, and it wouldn't install either.  It downloaded properly, and started installation then after a few minutes delivered the same message as the op had.  So maybe not a problem with windows update?

    1 person found this answer helpful.
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  4. Anonymous
    2020-09-11T15:15:53+00:00

    Ok I'll let you know if this fixes it

    1 person found this answer helpful.
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  5. Anonymous
    2020-09-13T11:51:53+00:00

    Hi,

    I've tried running the script and installing again, but with the same failure to install.

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