windows 11 insider preview 29639.1000 (rs_prerelease) install error - 0x80070005.

Bob Popil 5 Reputation points
2026-08-14T04:08:50.2+00:00

Above update won't load on my computer after repeated attempts.................how to fix?

Windows Insider program | Windows Insider preview | Install, activate, and Windows update
Answer recommended by moderator
CrazyKats 19,330 Reputation points Volunteer Moderator
2026-08-17T22:30:11.9166667+00:00

Hi Bob,

Build 29648 is out today and your error

is now listed as a Known Issue with the hopes

of getting it fixed in the next build release.

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  1. AI answer

    2026-08-14T04:09:08.3566667+00:00

    0x80070005 means Access is denied. For Windows Update, this usually points to a permissions problem affecting the Windows component store, C:\Windows\WinSxS, C:\Windows\SoftwareDistribution, or interference from security software or filter drivers.

    Use this order:

    1. Back up the OS disk first The documented troubleshooting includes permission resets and repair actions.
    2. Reset permissions on the component store Open Command Prompt as administrator and run: 
         icacls "%windir%\WinSxS" /reset /t /c /q
   icacls "%windir%\SoftwareDistribution" /reset /t /c /q
      Restart the PC and try the update again.
    3. Restore TrustedInstaller ownership on WinSxS In an elevated Command Prompt, run: 
         icacls "%windir%\WinSxS" /setowner "NT SERVICE\TrustedInstaller" /t /c /q
      Restart and retry the update.
    4. Reset Windows Update components In an elevated Command Prompt, run: 
         net stop wuauserv
   net stop bits
   net stop cryptSvc
   
   ren %windir%\SoftwareDistribution SoftwareDistribution.old
   ren %windir%\System32\catroot2 catroot2.old
   
   net start cryptSvc
   net start bits
   net start wuauserv
      Restart and try again.
    5. Repair the component store Run: 
         DISM /Online /Cleanup-Image /RestoreHealth
      Then restart and retry.
    6. Check system file integrity Run: 
         sfc /scannow
      If it completes and repairs files, restart and test Windows Update again.
    7. Check for third-party interference
      • Temporarily disable real-time antivirus protection.
      • In an elevated Command Prompt, list file system filter drivers: 
             fltmc
      • If non-Microsoft filter drivers appear, temporarily unload each one: 
             fltmc unload <DriverName>
      Restart and retry the update.
    8. For an Azure VM only If this is an Azure VM, use Azure portal > VM > Operations > Run command and run the Azure VM Windows Update Reset Tool.
    9. If it still fails Review update logs for 0x80070005:
      • Generate Windows Update log in PowerShell: 
             Get-WindowsUpdateLog
      • Also review CBS.log for E_ACCESSDENIED entries.

    For Insider Preview builds specifically, one accepted support response notes that repeated 0x80070005 failures can be part of a broader Insider build issue. If standard repair steps have already been tried and the problem continues, avoid making more manual ACL or ownership changes beyond the documented steps, back up important files, and wait for a newer Insider build.

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

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  2. Thomas4-N 21,545 Reputation points Microsoft External Staff Moderator
    2026-08-16T13:40:22.55+00:00

    Hello Bob Popil,

    Error 0x80070005 means Access denied, but I would avoid manually resetting permissions or changing ownership of the WinSxS folder unless the update logs specifically show a permissions problem. Those changes can create additional system errors.

    Since this is Windows 11 Insider Preview build 29639.1000 and the update has already failed repeatedly, try an in-place upgrade instead:

    1. Back up your important files.
    2. Download an ISO from the official Windows Insider Preview ISO page.
    3. Make sure the ISO matches your current language, edition, architecture, and Insider channel, and is newer than your installed build.
    4. In Windows, right-click the ISO and select Mount.
    5. Open the mounted drive and run setup.exe.
    6. When prompted, confirm that Keep personal files and apps is selected before continuing.

    This is a repair upgrade, not a clean installation, as long as Keep personal files and apps remains available and selected. If that option is unavailable, cancel Setup rather than proceeding.

    Also avoid making further ACL or ownership changes if you have already used tools that modified permissions on Windows system folders.

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  3. CrazyKats 19,330 Reputation points Volunteer Moderator
    2026-08-18T12:54:05.2633333+00:00

    Hi Bob,

    The error was not fixed in this build,

    hopefully in the next build.

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