Will do I normal use 7zip just got wincdemu yesterday for testing. What sum should install.wim have same as the isoDouble check that hash when you transfer to pc, just in case. I wonder if Explorer(as you are on w10) is messing up the iso mounting, use 7zip or wincdemu.
none of them worked can i send you my logs to try work out the problemRegarding error 18 please see here for more ideas.
I was planning on reinstalling windows guess I will need to do it then try then to see if it works then if it does do a second install with all the customisationI don't believe this is only about the image, as the link I suggested shows, it's mainly about the host WIM API being broken.
I suggest fixing the host, or use a cleanly installed virtual machine to make an image then copy it outside, if you cannot recover the host.