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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  1. Anonymous
    2020-11-16T13:24:00+00:00

    Yeah....

    Only that whatever lengthy instructions you typed, it was already there since last 45+ days in this 21 page long thread (and counting)!

    If only anything could ever work!

    This is a nice strategy by the SuperGods.

    Don't offer any proper solution.

    Instead of that, create an online forum where no one knows the other. 

    Let forum members crib online, put efforts in offering "solutions", do hours and days and weeks and months "trial-and-error", and keep making suggestions and complaints.

    Keeps Everyone busy, with no actual solution! :-)

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  2. Anonymous
    2020-11-17T10:29:12+00:00

    Since installing the complete update with the Media Creation Tool, all other subsequent cumulative updates worked flawlessly. However, I am still on v2004 and get updates for this build instead of upgrading to 20H2. 

    Does anyone have an idea as to why that is so?

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  3. Anonymous
    2020-11-17T11:30:10+00:00

    Since installing the complete update with the Media Creation Tool, all other subsequent cumulative updates worked flawlessly. However, I am still on v2004 and get updates for this build instead of upgrading to 20H2. 

    Does anyone have an idea as to why that is so?

    This is strange. 

    The current media creation tool does download 20H02 iso. 

    Make sure you download media creation tool from the website and use the downloaded version to create the iso for in site upgrade.

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  4. Anonymous
    2020-11-18T21:29:13+00:00

    Windows has gone from being a gaming platform in to an advertising platform (when it works), we need some competition to give microsoft a kick up the ****, tbh win10 is a bloody awful os, even mac osx is better and thats really scraping the barrel.

    And im not interested in linux either, i dont want to write war and peace on my keyboard to install a simple driver, linux is reserved for nerds and incels

    Im in the same boat, ive spent a good £2,000 on a ryzen machine, and as it stands my machine may as well be used as a doorstop.

    Theres one sure way of stopping windows update from working ever again and thats if you remove windows defender with msmg toolkit or ntlite, in short if you screw with the iso update wont work. This is no coincidence, its done on purpose.

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  5. Anonymous
    2020-11-19T06:35:51+00:00

    Windows has gone from being a gaming platform in to an advertising platform (when it works), we need some competition to give microsoft a kick up the ****, tbh win10 is a bloody awful os, even mac osx is better and thats really scraping the barrel.

    And im not interested in linux either, i dont want to write war and peace on my keyboard to install a simple driver, linux is reserved for nerds and incels

    Im in the same boat, ive spent a good £2,000 on a ryzen machine, and as it stands my machine may as well be used as a doorstop.

    Theres one sure way of stopping windows update from working ever again and thats if you remove windows defender with msmg toolkit or ntlite, in short if you screw with the iso update wont work. This is no coincidence, its done on purpose. 

    These instances only make the common users more vulnerable to sabotages from crooked hackers.

    In a desperate attempt to find a working solution to the problem, the common users blindly start following the instructions posted on such online forums. A perfect recipe for disaster, if a wrong person provides wrong inputs for stealing/sabotaging the users machine and key info!

    SuperGods at MS don't want to understand this simple problem.

    Such a pity - no solution even in months!

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