Build 26340.9577

Dennis5mile 90 Reputation points
2026-09-26T13:19:30.98+00:00

Build 26340.9577 failing to install.

Screenshot 2026-09-26 080826

Anyone else having this issue?

Dennis5mile

Windows Insider program | Windows Insider preview | Install, activate, and Windows update
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Answer accepted by question author
CrazyKats 20,005 Reputation points Volunteer Moderator
2026-10-02T17:51:02.6366667+00:00

Hi Dennis,

Build 26340.9596 is out.

But there is a Known Issue that

is the error you're seeing.

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  1. CrazyKats 20,005 Reputation points Volunteer Moderator
    2026-09-26T15:42:19.88+00:00

    Hi Dennis,

    I had no issues with the update.

    I would do the usual:

    Run sfc /scannow

    Run DISM

    Run Windows Update Troubleshooter

    If the update still fails, then I would do

    a repair install of the build you're on.

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    3 people found this answer helpful.
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