
I spent around 15 hours yesterday no exaggeration trying to diagnose this problem. Others have suggested the only thing I can do is install Windows 10 again but that’s really not an option that I would like to take.

I’ve tried to use Windows media to upgrade though and that said it couldn’t be done (presumably because I’m on the latest version). Upon trying to fix this as well I ran into the issue so I couldn’t fix it.

I tried using DISM to repair but got error 0x890f081f could not find source files. I have ran sfc /scannow in command prompt as admin and it came up clean. I get the error 0x80073701 Could not reference assembly whenever I try to install the WLSS via UI or PowerShell.
