Cumulative update won't install (KB4571756) (Error 0x800f081f)

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.

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Is It Formats all of my C drive Files and Data??

NO

You can choose that if you want to

Keep all your data files and settings

OR 

Remove all data

You can wait till October Patch Microsoft said 

Microsoft is aware of these installation issues

We can wait till next patch Tuesday 

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I know, just pause updates for 7 days and pray for it to be fixed.
That's what I'm going to do, been wasting days trying to force this thing to work

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Still not working for me.

Last update that has worked for me is https://support.microsoft.com/en-us/help/4565503/windows-10-update-kb4565503 which was 7/15.  

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I did a chat with a rep and they assured me it should be resolved with the next update. Haven't seen anything come down yet on my system? Anyone else?

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worked on 2 of my 3 laptops, continues to fail on 1.  i have no idea what the difference is.

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Might be failing on certain hardware configurations (just a hunch).
Admin976

ASUS TUF Gaming FX505DY
AMD Ryzen 5 3550H with Radeon Vega Graphics (2.0-3.7 GHz); AMD Radeon RX 560X Mobile (4 GB GDDR5)
8 GB DDR4 2400 MHz RAM
512 GB NVMe SSD; 1 TB External HDD (5400 RPM)

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Not a solution , merely workaround until next patch Tuesday, hide the offending update until resolved.

https://support.microsoft.com/en-us/help/3183922/how-to-temporarily-prevent-a-windows-update-from-reinstalling-in-windo

Francis
Dell XPS 8930 , Core i7-8700, Nvidia GTX 1070 , 16 Gb Ram, 256 Gb SSD , 4 Tb Hard drive.

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worked on 2 of my 3 laptops, continues to fail on 1.  i have no idea what the difference is.

Most interesting. I had the same results as you in that this update worked on two computers and this one, not so. 

I did the In Place Repair and it fixed several ongoing issues I had but weirdly enough, this particular update was not and has not be included. Checking the update history, everything installed successfully and it shows I'm up to day after numerous checks. 

It does appear the August update with this September update has got issues with certain computers and it's much like stepping into a bowl of oatmeal. Oh, by the way, don't try that. It makes a mess and causes a lot of disturbance in the home. 

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Not a solution , merely workaround until next patch Tuesday, hide the offending update until resolved.

https://support.microsoft.com/en-us/help/3183922/how-to-temporarily-prevent-a-windows-update-from-reinstalling-in-windo

Next patch tuesday is October 13th, just a heads up to everyone, pause updates till that day.

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I have been struggling with the same error since weeks now, I sincerely hope windows resolves this issue soon. 

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Last updated November 25, 2020 Views 13,748 Applies to: