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Briefly-icy's avatar
Briefly-icy
Copper Contributor
Dec 10, 2024

Can't update windows 11 (Install error - 0x800736cc)

I am currently enrolled in the Windows 11 Dev Channel.

Current Windows Version and Edition:

  • Windows 11
  • Version 24H2 (OS Build 26120.1350)

The version I am trying to update to:

  • Windows 11 Insider Preview 10.0.26120.2415 (ge_release_upr) (Repair version)

Error encountered during the update:

  • Install Error - 0x800736cc

Troubleshooting steps I have already tried:

  1. Restarting File Explorer
  2. Running multiple SFC and Deployment Image Servicing and Management tool scans

These scans identified corrupted files in the CBS.log file, but the issues could not be resolved.

Unfortunately, none of these solutions have worked, despite several attempts and I am can't perform a clean installation of Windows.

I have attached screenshots for reference.

 

 

  • Pzrior's avatar
    Pzrior
    Copper Contributor

    OP, how much time it takes to fully scan a 256GB drive with SFC command?

  • Ankido's avatar
    Ankido
    Iron Contributor

    The error code 0X800736cc may occur due to damaged Windows system files. To troubleshoot this issue, I recommend running the System File Checker tool, which can repair missing or corrupted system files on your computer.  

    If the problem persists after using the System File Checker, I suggest running the System Update Readiness tool to resolve any Windows system errors.  https://learn.microsoft.com/en-us/troubleshoot/windows-server/installing-updates-features-roles/fix-windows-update-errors

     

    I hope it resolves the problem.

  • kyazaferr's avatar
    kyazaferr
    Steel Contributor
    1. Insider Program Specific Checks
    • Verify Insider Preview settings
    • Check Windows Insider Program registration
    • Ensure sufficient disk space (at least 16GB free)
    1. Alternative Update Methods
    • Use Windows Update Assistant
    • Download update media directly from Microsoft
    • Consider performing an in-place upgrade

    Diagnostic Information to Collect:

    • CBS.log contents
    • Windows Update log (%SystemRoot%\Logs\CBS)
    • Windows Update diagnostic report
  • kyazaferr's avatar
    kyazaferr
    Steel Contributor

    Registry and Temporary File Cleanup

    # Clear Windows Update Cache
    reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate" /f

    # Remove Temporary Update Files
    del /q/f/s %SystemRoot%\Downloads\*

    • Frederickk's avatar
      Frederickk
      Iron Contributor

      Does clearing the Windows Update cache and removing temporary files help resolve specific system issues, like slow updates or storage problems?

      Also, if you're clearing temporary update files with the command del /q/f/s %SystemRoot%\Downloads\*, be sure you don’t remove any files that might be important for pending updates. You might want to check if any files are still pending in the Windows Update process before you clear them.

      Let me know how it's going or if you need more advice!

  • kyazaferr's avatar
    kyazaferr
    Steel Contributor

    Windows Update Diagnostic Commands

    # Stop Windows Update Services
    net stop wuauserv
    net stop bits
    net stop cryptsvc

    # Reset Windows Update Components
    ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
    ren C:\Windows\System32\catroot2 catroot2.old

    # Restart Services
    net start wuauserv
    net start bits
    net start cryptsvc

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