[sublynx]

This is a bit of an extreme solution as it is both inconvenient and demands a lot of effort, but maybe you can make your computer dual booting. If you can run Windows 7 64/bit I would think that you might have room for XP running on the computer as well. If SH3 would then work in your computer in XP we would at least know the problem is not hardware related.

Before trying that I would download Directx9 and install that. I think installing DX11 messes up the older versions which can leave some games without the stuff they need to run properly.

Another thing you might try is to download H.sie\s realism oriented mod from SH3mod workplace. That mod writes a new SH3.exe. Maybe the newly written SH3.exe would work.