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Unable to update Windows - KB5065426

Sanjay Khandkar 0 Reputation points
2025-10-01T00:18:08.82+00:00

Hi

I have repeatedly come across this error message when updating windows (KB5065426).

2025-09 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5065426) (26100.6584)

Error message: Install error - 0x800f081f

After running the Windows Update troubleshooter - it asked me to contact Microsoft Support (ticket #7087956564).

I contacted them and the agent asked me to run In Place Upgrade which I did.

However, even this failed with this screenshot below:

Windows - update - failure.png

Need help to fix this.

BTW I was unable to contact an agent - the only I saw was to post a question!

Windows for business | Windows Client for IT Pros | Devices and deployment | Install Windows updates, features, or roles
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  1. Quinnie Quoc 5,840 Reputation points Independent Advisor
    2025-10-01T01:20:44.84+00:00

    Hi,

    The error code 0x800f081f typically points to missing or corrupted system files that Windows Update relies on, and it’s clear you’ve already tried the recommended steps, including the In-Place Upgrade.

    Since that didn’t resolve the issue, we’d suggest running the DISM and SFC tools to scan and repair system components. You can do this by opening Command Prompt as administrator and running the following commands one at a time:

    Code

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

    If the issue persists, we may need to look into update logs or consider manually installing the update via the Microsoft Update Catalog. We understand it’s frustrating not being able to reach an agent directly—thanks for your patience, and we’re here to help you move forward.

    If my answer is useful for you, please vote for it.

    Best regards,

    Quinnie Quoc.

  2. Sunitha ka 5 Reputation points
    2025-10-10T14:47:36.79+00:00
    0 comments
  3. Sunitha ka 5 Reputation points
    2025-10-10T14:50:38.2933333+00:00
    0 comments

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