how to fix this update error show always in Windows 11 Insider Preview 29639.1000 (rs_prerelease)

Siddharth Dubey 0 Reputation points
2026-08-16T08:26:04.8233333+00:00

Windows 11 Insider Preview 29639.1000 (rs_prerelease) after restarted this show always error encountered but when I check from troubleshooter they do not detect any problem and I almost try to this update up to 13 times so how I can fix this

Windows Insider program | Windows Insider preview | Other
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  1. AI answer

    2026-08-16T08:26:20.29+00:00

    Try these steps in order for a Windows 11 Insider update that repeatedly fails after restart:

    1. Run the Windows Update troubleshooter again from Start > Settings > System > Troubleshoot > Other troubleshooters > Windows Update > Run.
    2. Restart the PC.
    3. Go to Start > Settings > Windows Update > Check for updates and try the update again.

    If it still fails, use the advanced repair steps below.

    1. Open Command Prompt as administrator.
    2. Run these commands one at a time:
    net stop bits
net stop wuauserv
ren %systemroot%\softwaredistribution softwaredistribution.bak
ren %systemroot%\system32\catroot2 catroot2.bak
net start bits
net start wuauserv
    1. Restart the PC and try Windows Update again.

    If the issue continues, repair system files:

    1. Open Command Prompt as administrator.
    2. Run:
    DISM.exe /Online /Cleanup-image /Restorehealth
sfc /scannow
    1. Wait for sfc to reach 100%, then try the update again.

    Additional checks that can help with upgrade failures:

    • Disconnect nonessential external hardware such as USB drives, printers, scanners, speakers, and external hard drives.
    • Temporarily uninstall third-party antivirus or security software before updating, then reinstall it after the device is up to date. Make sure installation media or product keys are available first.
    • If a previous installation cleanup is pending, restart the device and try setup again.

    Warning: the Command Prompt repair steps require administrator permissions. Renaming Windows Update folders and running DISM/SFC are standard repair actions, but they should be entered exactly as shown.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. CrazyKats 19,240 Reputation points Volunteer Moderator
    2026-08-17T22:34:24.16+00:00

    Hi,

    There's a new build 29648 out today, but if this

    was your error it's now a Known Issue:

    User's image

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  3. CrazyKats 19,240 Reputation points Volunteer Moderator
    2026-08-16T15:50:45.7533333+00:00

    Hi,

    What is the error message or # that is shown?

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