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I am using Windows 10 version 21H2 and Windows Updates have been failing for a while. I have tried every 'solution' I can find but nothing has worked so far.

Three updates are failing:

  • Feature Update to Windows 10, version 22H2 - Failing with unknown error.
  • 2023-10 Update for Windows 10, version 21H2 for x64-based systems (KB4023057) - Failing download with error 0x800f0805
  • 2023-05 Update for Windows 10, version 21H2 for x64-based systems (KB5001716) - Failing download with error 0x80070643

I have searched the Microsoft Update Catalogue but cannot find any of these updates there, either by name or KB number, so am unable to install them manually.

I have tried stopping and starting the Update services, renaming the directories, etc., none of which have worked.

Short of a fresh install, which is out of the question until I have exhausted all avenues, I'm currently out of ideas so am hoping some secret genius here can help.

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    Post the Windows Update log. KB4023057 failing means you have not installed an update since March 2021. I have KB4023057 on the Windows Update Catalog but the update was never released for 21H2. Windows 10 21H2 stop receiving updates more than a year ago.
    – Ramhound
    Commented Jan 23 at 12:48
  • That is correct, I cannot install any updates. The Windows Update log does not go back that far, and the only recent entries just say that updates have failed to download.
    – Rich M
    Commented Jan 23 at 13:22
  • I can’t help without the log.
    – Ramhound
    Commented Jan 23 at 13:44
  • Log Name: Microsoft-Windows-WindowsUpdateClient/Operational Source: Microsoft-Windows-WindowsUpdateClient Date: 23/01/2024 11:22:44 Event ID: 31 Task Category: Windows Update Agent Level: Error Keywords: Failure,Download User: SYSTEM Computer: XXXXX Description: Windows Update failed to download an update.
    – Rich M
    Commented Jan 23 at 13:51
  • There is more to that log then that and that’s unreadable as a comment.
    – Ramhound
    Commented Jan 23 at 14:05

1 Answer 1

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You have an older version of Windows 10.

At this point, you need to try a Windows 10 Repair Install

Go to the Windows Media Creation Link

https://www.microsoft.com/en-us/software-download/windows10

Windows 10/11 is running, so click on the Download button (not Upgrade Button) and select Run. This will launch the Repair. Proceed normally answering the prompts. The default Keep prompt is to Keep Everything.

This will bring Windows 10 up to the current version.

If the Repair Install with the Keep Everything Option fails to work, then back up and reinstall Windows 10 is the best next step.

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