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.

0 comments

217 answers

Sort by: Oldest
Most helpful Newest Oldest
  1. Anonymous
    2020-10-13T17:01:50+00:00

    Don, you're exactly right.  I downloaded the ISO file, burned it to DVD, ran setup, chose to "reinstall and keep apps, settings and data.  Installation worked perfectly.  Windows update then installed several updates, included the infamous KB4571756.  I'm so happy I'm going to play golf this afternoon!  Good luck to everyone...

    Was this answer helpful?

    0 comments
  2. Anonymous
    2020-10-13T18:55:29+00:00

    Don, you're exactly right.  I downloaded the ISO file, burned it to DVD, ran setup, chose to "reinstall and keep apps, settings and data.  Installation worked perfectly.  Windows update then installed several updates, included the infamous KB4571756.  I'm so happy I'm going to play golf this afternoon!  Good luck to everyone...

    Just to understand the difference : you did the reinstall maintaining apps and data, which maintains only windows store apps and deletes all other installed applications? 

    Why not the in place upgrade option which does maintain everything as this is the equivalent of a feature update?

    Was this answer helpful?

    0 comments
  3. Anonymous
    2020-10-13T20:25:19+00:00

    Just got the October updates.  Rebooted.  No new updates found.  1756 is gone now.  

    Was this answer helpful?

    0 comments
  4. Anonymous
    2020-10-13T22:58:09+00:00

    I just got Update 9311 and it fails to install. Tried twice. Same error 0x800f081f.

    **** POS:

    Was this answer helpful?

    0 comments
  5. Anonymous
    2020-10-14T04:09:20+00:00

    I have the same problem😢

    What's going on Microsoft??!!

    Was this answer helpful?

    0 comments