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2025-10 Cumulative Update for Windows 11, version 25H2 for x64-based Systems (KB5066835) (26200.6899) keeps on failing for me

Markens Desir 265 Reputation points
2025-10-14T20:26:53.6066667+00:00

This update keeps on failing for me and I've tried to download it from the Microsoft catalog and im still getting errors, the error codes im getting is "Download error - 0x80240069" from the windows update & im getting a error from the standalone installer saying 0x800700c1.

Also does this cause nvidia to not function properly because im aslo getting a 7zip CRC data error when trying to download the latest graphic driver

Windows for home | Windows 11 | Windows update

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  1. Nicholas Page 161 Reputation points
    2025-10-17T07:27:35.65+00:00

    Had a similar install failure with this update and worked on it for a few days. I found there's a conflict if you have an old install that goes back to Windows 8 where registry keys left behind by the old Windows Store bugs up the event logs for the new Microsoft Store and causes this update to fail.

    The best place to start troubleshooting is in the "C:\Windows\Logs\CBS\CBS.log" and search for errors. If you look for the string "A rollback will be initiated" is a good place to look because right before that should be the problem that caused the update to fail.

    And if you find any errors such as:

    00000a04 (F) Error HRESULT_FROM_WIN32(15010) in eventsXml: <events><provider guid="{9c2a37f3-e5fd-5cae-bcd1-43dafeee1ff0}" message="$(string.eventProviderName)" messageFileName="%SystemRoot%\System32\LicenseManager.dll" name="Microsoft-Windows-Store" resourceFileName="%SystemRoot%\System32\LicenseManager.dll" symbol="Microsoft_Windows_Store">

    Accompanied by:

    00000a07 (F) Failed execution of queue item Installer: Events ({3bb9fd2b-351e-4b9c-b1fc-ed0758805998}) with HRESULT HRESULT_FROM_WIN32(15010).  Failure will not be ignored: A rollback will be initiated after all the operations in the installer queue are completed; installer is reliable[gle=0x80004005]

    Then you may also see above it:

    00000a03 wevtconfig warning #77: Channel Microsoft-Windows-Store/Operational is declared by an existing provider Microsoft-Windows-Store-Client-UI{{53e3d721-2aa0-4743-b2db-299d872b8e3d}}.

    And the fix is to just delete the following registry key, reboot and retry:

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WINEVT\Publishers{53e3d721-2aa0-4743-b2db-299d872b8e3d}]

    And otherwise, start with the logs and you should find the answer, but it might take some searching.

    28 people found this answer helpful.
  2. Maria Papanastasiou 115 Reputation points
    2025-10-15T14:02:57.2666667+00:00

    Ok, i might have found a fix, it is fixed for me, so basically it's a new option that Microsoft had added a year ago i think, it's called: fix problems using windows update, it's a feature that basically reinstalls your current version of the operating system via windows update and fixes corruption and issues, but keeps all your files, apps without deleting them, you can access it by going to the settings, recovery and the option is fix problems using windows update, click it follow the instructions and it will direct you to windows update, there it will download the current version (repair version) and it will restart the system, once it's over you are basically fine, for me i checked the windows update and the problematic update was not there, and i can't get it, but i checked the version number and its up to date i think, this is not a 100% guaranteed fix but try it for yourself if you want.

    13 people found this answer helpful.
  3. Doni Cahyanto 55 Reputation points
    2025-10-16T03:07:18.2733333+00:00

    Open Command Prompt As Administrator and do this:

    1. dism /online /cleanup-image /restorehealth
    2. sfc /scannow
    3. dism /online /cleanup-image /startcomponentcleanup

    Then Restart and update your windows again.

    Its work for me. I could update my windows to build 6899

    11 people found this answer helpful.
  4. Geoffrey March 35 Reputation points
    2025-10-16T00:24:25.8533333+00:00

    Installing the 25h2 repair version fixed this problem, a security center problem and the update troubleshooter problem.

    5 people found this answer helpful.
  5. John DeV 147K Reputation points Independent Advisor
    2025-10-14T21:03:01.2733333+00:00

    Hi, good day!

    Please let me know if you have tried the methods below.

    • Disable or uninstall any third-party VPN and Antivirus program to prevent it from interfering with the update.
    • Run the Windows Update Troubleshooter Open Settings > System > Troubleshoot > Other troubleshooters > Windows Update > Run troubleshooter
    • Make sure Windows Update and Background Intelligent Transfer services are available and running.

    Press Windows key+R to open Run then type: services.msc

    Press Enter to open Services app

    Double-click Background Intelligent Transfer Service.

    If the Startup status lists Stopped, click Start and then click OK. If the status is Running, right click then select Restart

    Double-click Windows Update.

    If the Startup status lists Stopped, click Start and then click OK. If the status is Running, right click then select Restart

    I look forward to receiving your update and I'm willing to collaborate with you till we resolve the issue. Do keep me informed by clicking "Add comment" below.

    Standard Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

    2 people found this answer helpful.

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