[SOLVED] Can not install Windows 21H1 Update

[andrew528]

I have a rather new Windows install from April 2021

Recently I have been unable to install the 21H1 update by any means. Windows update was failing, Media tool/in place upgrade fails too.

SFC and DISM report all sorts of errors. DISM mainly wants to complaint about the "source" despite pointing it to all sorts of sources -- WIM files, ESD files, mounted WIM directories, etc.

I really don't want to do a clean install since I literally just finished installing and getting everything setup.

sfc /scannow

Beginning system scan.  This process will take some time.

Beginning verification phase of system scan.
Verification 100% complete.

Windows Resource Protection found corrupt files but was unable to fix some of them.
For online repairs, details are included in the CBS log file located at
windir\Logs\CBS\CBS.log. For example C:\Windows\Logs\CBS\CBS.log. For offline
repairs, details are included in the log file provided by the /OFFLOGFILE flag.

Dism /Online /Cleanup-Image /RestoreHealth

Deployment Image Servicing and Management tool
Version: 10.0.19041.572

Image Version: 10.0.19042.631

[==========================100.0%==========================]
Error: 0x800f081f

The source files could not be found.
Use the "Source" option to specify the location of the files that are required to restore the feature. For more information on specifying a source location, see https://go.microsoft.com/fwlink/?LinkId=243077.

The DISM log file can be found at C:\Windows\Logs\DISM\dism.log

SFCFix version 3.0.2.1 by niemiro.
Start time: 2021-06-16 01:44:39.435
Microsoft Windows 10 Build 19042 - amd64
Not using a script file.




SFCFix version 3.0.2.1 by niemiro has encountered an unhandled exception.
Currently storing 130 datablocks.
Finish time: 2021-06-16 01:44:45.726
----------------------EOF-----------------------

 

[andrew528]

I managed to solve this.

Before I ran the last round of SFC/DISM/SFCFix I had already copied corrupt manifest files from my other PC. This allowed me to run the 21H1 in place upgrade (after changing a registry key for the current Windows build documented on another site). Afterwards I ran SFC and DISM which found and fixed some further errors. A 2nd run reported no errors.

Unless anyone has any other suggestions to run to make sure everything is 100% on point...

I want to thank everyone here, it is the only place online where people actually try to resolve these Windows corruption issues.