I know that, but I changed a number of configurations without reinstalling Windows and never had a single problem. It is a matter how do you clean your Windows from unwanted software and drivers, some job to be done, boring, but it is possible. Only if you could boot into Windows. I repaired some Windows booting problems years ago, after configurations change, it is not so compilated, but this time change from MBR to GPT is new thing to me. As I told you, I boot both Windows fine in MBR mode, installed all drivers, worked on them for a week, everything worked perfectly. Now, after this MBR to GPT change, I stucked with black screen with moving Cursors, with high probability it is GPU driver. If we could somehow make Windows 10 to use its driver just for one boot, I would fix all other things. Just a single boot needed here.
I also think that SCF command is needed, but I could never make it work in offline mode. If you check the most recent DISM.log file I uploaded, although it ran successfully it shows that some path are not found also. Maybe, it could be part of solution.
