I have a Similar problem in which I cannot install the latest windows 10 update I get to 75 percent and then it says it can’t continue and resets.
My computer is a Windows 7 machine upgraded to Windows 10.
I have ran sacs scan and it found corrupt files.
Done all the other scans that you have suggested and I did get that source/image is repairable.
Tried all the Command prompts DIM/Online and that would not work either.
Using Microsoft media creation I re download windows 10 Is Mounted it do a dad and pointed the DIM online source to F: it also says that source fills could not be found.
I have even tried to reset Windows 10 but that encounters problems as well
I have even tried to reset windows through ISO and that encounters problems as well.
I don’t want to do a complete restore because I will Lose MS office that I paid for through my old work place an and my Windows 7 REG Key would not work with windows 10.
Can you suggest anything else.
Will any of these fix the issue