This is probably the last test. If this doesn't work then ####.
I tested and fixed some bugs that cause setup not to even start at all in Windows 8 but I tested it on VM, results may not be the same for other PC so please test this.
About the attachment, it is for system check, it must be accurate, I tried to fix the bug for GPU with more than 2GB videoram. I also attached a picture, there is text highlighted in yellow, I made a couple of changes with the values of the highlighted text and they must be your top priority when testing.
Thank you, probably going to bed, been a long day trying to wrestle with this bug, I hope I win.