Windows Update Troubleshooter failing to run, anyone else having problems?

Reported
Anonymous
2024-12-11T16:13:47+00:00

Both my Desktop and Laptop are suffering the same problem when attempting to run the Windows Update Troubleshooter. Operating system is Windows 11 24H2 with all updates applied to 11 December 2024 including KB5048667. After going through to the point where the troubleshooter runs, I get "I'm sorry.  I was unable to run the Windows Update diagnostic. I might need to transfer you to an agent to help solve your problem." I've done all the obvious (sfc, DISM) and no problems were found. I'm thinking it must be a generic problem as it happens on both my Windows 11 machines.

Windows for home | Windows 11 | Windows update

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  1. Ramesh 181.2K Reputation points Volunteer Moderator
    2025-01-18T15:57:07+00:00

    Woo! Success! Finally, it installed then I had to restart my PC which took abut 30 minutes to update. My OS build number is now 26100.2894. Is that up to date now?

    Thanks again for your help with this! Appreciate it! :-)

    Glad to hear that. 👍

    Yes, 26100.2894 is the latest quality update.

    https://support.microsoft.com/en-us/topic/january-14-2025-kb5050009-os-build-26100-2894-bdbfb097-ea20-487d-9171-718d15e26f1b

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  2. Anonymous
    2025-01-18T15:52:16+00:00

    Woo! Success! Finally, it installed then I had to restart my PC which took abut 30 minutes to update. My OS build number is now 26100.2894. Is that up to date now?

    Thanks again for your help with this! Appreciate it! :-)

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  3. Ramesh 181.2K Reputation points Volunteer Moderator
    2025-01-18T15:44:20+00:00

    It says 26100.2605...

    EDIT - the download has suddenly changed to install and is at 17%...

    I hope it worked eventually.

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  4. Anonymous
    2025-01-18T15:03:47+00:00

    It says 26100.2605...

    EDIT - the download has suddenly changed to install and is at 17%...

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  5. Ramesh 181.2K Reputation points Volunteer Moderator
    2025-01-18T14:59:46+00:00

    Please try the offline installer.

    First, install the checkpoint update which is a prerequisite for KB5050009: https://catalog.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/d8b7f92b-bd35-4b4c-96e5-46ce984b31e0/public/windows11.0-kb5043080-x64_953449672073f8fb99badb4cc6d5d7849b9c83e8.msu

    And then install KB5050009. https://catalog.sf.dl.delivery.mp.microsoft.com/filestreamingservice/files/66557ecc-650e-4c70-8baf-c624c4de912f/public/windows11.0-kb5050009-x64_97aac2ab4f607b11d50ad2fd88a5841ee0b18dd5.msu

    Thanks but when I open the checkpoint file I get this message:

    Image

    What documentation does it refer to and where do I find it?

    Run "winver.exe" and note the OS build number.

    If it says 26100.2894, you don't need the checkpoint update or the KB5050009 update. KB5050009 seems to be repeatedly offered to some users, though it's already installed.

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