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
    2020-10-02T15:01:13+00:00

    Like a proper wipe and reinstall? All data and programs wiped?

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  2. Anonymous
    2020-10-02T15:00:33+00:00

    i contacted microsoft support and got online support. there was no solution but reinstall...

    so i did . reinstall worked.  

    but we need better work on updates from microsoft.

    thanks for the tips. Rudi

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  3. Anonymous
    2020-10-02T12:59:20+00:00

    Have you tried checking the optional updates? I found the October patch there. Currently trying to install it.

    EDIT: When I clicked on the October patch and told windows to install it, it did nothing apparenltly. I ran check for updates once more just to be sure but nothing. I'm gonna try downloading it from the MUC and installing it manually.

    EDIT 2: When I searched "KB4577063" (October patch) in the MUC, it displayed an error:

    EDIT 3: So last time the update failed it seems. I restarted and tried to install again. It goes up to 100% installed and silently fails:

    Unsuprisingly, it gives the same error.

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  4. Anonymous
    2020-10-02T10:17:36+00:00

    The update now option is for people not on windows 10 who want to update to windows 10.  When I click on, it downloads an app and tells me I am already updated.

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  5. Anonymous
    2020-10-02T09:20:36+00:00

    Clicking the "Update Now" button downloads the update manager, which simply tells me my system is already up to date. It only wants to update to the 2004 release but not to the latest CU's.

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