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
    2020-10-19T12:43:44+00:00

    It's not just you who had the issue. A lot of PCs have been affected and not even my own problem was solved with one in-place upgrade. So keep your calm, in-place upgrade works for some doesn't for others

    • clearly indicating it isn't a PERFECT solution. We need info from MS since they would probably know better.

    Agree totally,

    Using the 2004 iso image for a clean install or in place upgrade is not advised since this is the same image that started update problems for the 3 last months. 

    I would even wait for the next 20H2 iso to be proven to be safe in the field before using it for a repair. 

    If it ain't broken don't fix it ( from unknown but wise guy)

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  3. Anonymous
    2020-10-19T11:18:24+00:00

    It's not just you who had the issue. A lot of PCs have been affected and not even my own problem was solved with one in-place upgrade. So keep your calm, in-place upgrade works for some doesn't for others - clearly indicating it isn't a PERFECT solution. We need info from MS since they would probably know better.

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  4. Anonymous
    2020-10-19T09:27:30+00:00

    Just don't experiment anything.......don't try to fix anything by in-place or clean reinstall or whatever......

    Sit tight with whatever is working....else you risk screwing up that as well :-(

    I cannot confirm that. 

    I had been having trouble installing the CU's since August, and the in-place update with the media creation tool solved this once and for all for me.

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