GuideIssuesWindows Update Windows 10 Update Failure Analysis Updated August 17 2024
Known fixes:

"The system registry contains invalid file paths. Installation cannot proceed. This system image was applied without guaranteeing that drive-letter assignment would match across computers."
Set Environment Variable Path to: %SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\
Remove 'Windows_Tracing_Flags' and 'Windows_Tracing_Logfile'


These tools let you do some diagnosis:

Setupdiag allows you to try to determine why a Windows 10 upgrade failed.
https://docs.microsoft.com/en-us/windows/deployment/upgrade/setupdiag
Usage:

Copy to Clipboard SetupDiag.exe /Output:C:\$WINDOWS.~BT\Results.txt /LogsPath:C:\$WINDOWS.~BT\Sources\Panther notepad c:\$windows.~bt\results.txt


You can also analyze the log files:
https://support.microsoft.com/en-us/topic/log-files-that-are-created-when-you-upgrade-to-a-new-version-of-windows-9ec8aa31-0cc1-a0b2-2d98-e9c6714349b9


You can save this to a .bat file and run as admin:
Copy to Clipboard SC config trustedinstaller start= auto net stop bits net stop wuauserv net stop msiserver net stop cryptsvc if exist %Systemroot%\SoftwareDistribution.old rd /q /s %Systemroot%\SoftwareDistribution.old Ren %Systemroot%\SoftwareDistribution SoftwareDistribution.old if exist %Systemroot%\System32\catroot2.old rd /q /s %Systemroot%\System32\catroot2.old Ren %Systemroot%\System32\catroot2 catroot2.old dism /Online /Cleanup-image /ScanHealth dism /Online /Cleanup-image /CheckHealth dism /Online /Cleanup-image /RestoreHealth dism /Online /Cleanup-image /StartComponentCleanup Sfc /ScanNow




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