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
    2020-09-14T18:38:37+00:00

    Same issue security update fails every time and wont allow any other updates to install i also have noticed that the 2004 update completely trashes SSD's and even mechanical hard drives as well

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  2. Sumit 44,306 Reputation points Volunteer Moderator
    2020-09-14T15:58:25+00:00

    No, a Reset removes all the apps and files(depending on which option you select). A repair install keeps most of the settings, all apps and files. It should fix the issue usually, and there is no harm in trying. Step 6 is what is the easiest one to do and the whole process is automatic.

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  3. Anonymous
    2020-09-14T15:19:16+00:00

    The update is bugged. Wait for the October patch.

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  4. Anonymous
    2020-09-14T15:13:16+00:00

    I also have a problem with KB4571756, but not quite the same as OP.  In my case, updates shows "Pending Restart".  However, no matter how many times I restart, it keeps coming back 'Pending Restart".  So, I assume the install just won't complete.

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  5. Anonymous
    2020-09-14T10:58:37+00:00

    By repairing the installation do you mean you're gonna reset my PC or something? If it's that I'll better wait for the october patch.

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