Error code 0x800f0805 when trying to download: KB5122878 and KB5127070

david ruffell 0 Reputation points
2026-09-30T20:27:28.2166667+00:00

I am unable to download/install updates...KB5122878 and KB5127070, all I get is error code: 0x8oof0805. I've tried many times to no avail. Phone support reads from a script so no help there. An AI/Bot "Harsh" tried to help. It took control of my laptop and eventually told me that it is not able to receive updates. I told it that ESU was extended for a further year, all it did was to repeat what it had said...A brick wall.

Then I contacted copilot, it was like a breath of fresh air. It seems that Microsoft have neglected to install the info re' the extended ESU in their Chatbots. As the AI thing " harsh" didn't know about the extension, the phone bot was a dead end, and trying to speak to a human was like trying to contact God and the fact that Microsoft have neglected to update their ESU I have no idea what to do next.

Copilot tried to help with a lot of instructions to go through but I don't feel comfortable attempting that, nor should I have to.

Can anyone tell me how to speak to a Human and get this problem sorted out, after all, there must be many thousands of people facing this problem.

Windows for home | Windows 10 | Windows update
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  1. Md Alamin Ali 0 Reputation points Student Ambassador
    2026-10-27T20:10:28.4966667+00:00

    Error 0x800f0805 is often related to an update servicing or component store issue. Since you're on the ESU program and Windows is otherwise working, I wouldn't jump straight to a reinstall.

    First, confirm that the ESU license has activated correctly and that the required servicing stack updates are already installed. Then try running:

    DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

    After both complete, restart and check for updates again.

    If the same KBs continue to fail, try downloading and installing them manually from the Microsoft Update Catalog. The installation logs in Event Viewer and WindowsUpdate.log may also provide a more specific error than 0x800f0805.

    As for speaking to a human, Microsoft Support should be able to review your update history and ESU entitlement directly. Given that multiple update attempts are failing, it may be worth escalating through support rather than repeatedly retrying the installation.

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  2. Airbus A350 8,305 Reputation points Volunteer Moderator
    2026-09-30T21:33:16.4133333+00:00

    Hello,

    When you get error 0x800f0805 when installing updates, this means that the update files for that specific update are corrupt or invalid.

    You should be able to fix this by going to Settings > Updates & Security > Troubleshoot > Additional troubleshooters and select the Windows Update troubleshooter.

    Please let me know if you are able to continue updating your PC. If not, I can suggest more steps.

    I hope to hear back from you.

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