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

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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  2. Anonymous
    2020-10-11T13:35:35+00:00

    Sorry to say, but the hopelessness with MS Updates continues even with this last and extreme step.

    After the in-place repair ran for around an hour, hit 87% progress, and then showed "The PC is restarting", then I get a prompt message that "Windows Installation has FAILED"

    No option but to click OK on that prompt.

    Then I restart the PC..... It shows the manufacturer logo....then goes on to show the Windows Logo (Blue) and the rotating dotted circle below it.

    It was stuck at that rotating circle for more than 20 minutes, and my breadth was hanging if I will ever get my Windows at least in the same working state as earlier.....

    Fortunately, it moved forward after the long wait. Showed login screen, and after login, this is what I see:

    What does this error indicate? Is there any fix for this???

    It again sucked 400 MB of internet data....

    Horrible experience, even with the extreme step..

    Nothing works in Windows Update - have been suffering with these lousy updates several times over the past many years.....sometimes these updates crash the PC leading to data loss, sometimes they hit the net connectivity leaving one completely paralyzed...and absolutely no help available for months!

    Sorry, but it is pathetic on part of Microsoft for messing up the work, business and eventually the livelihoods of so many individuals like this. Why cant a simple fix be offered even though this issue is considerably old now??

    My request to other fellows out there - Please don't try anything....just let the updates remain stuck...

    Whatever is working so far may also stop with such trial and error.

    Just wait and wait and be at the mercy of MS, or go to Mac or Linux.... :-((((

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  3. Anonymous
    2020-10-11T13:50:36+00:00

    This is weird and the first case of the repair upgrade just failing. I'm afraid I can't help from here but others might be able to. Good luck.

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  4. Anonymous
    2020-10-11T13:57:54+00:00

    Thanks for a clear explanation; they're hard to find in this technological world.

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  5. Anonymous
    2020-10-12T14:26:20+00:00

    So I was having the same issue and solved it by doing an in-place upgrade with a USB drive created using the MediaCreationTool2004

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