OK I think I figured it out.
I had recently updated my machine from Windows 7 to Windows 10. Apparently somewhere in the processes I went from 64-bit Win 7 to 32-bit Win 10. I had assumed doing the upgrade would keep something like that the same, but apparently i missed a checkbox or it didn't give me the option or something.
Someone on the Steam discussion thread said that this could be causing the conflict.
It means i will have to do a clean install of Windows to install 64 bit version of Win 10, but I will report back once I've done so.
I think this must be the issue as the laptop I tried it on was 64 bit OS.
Anyone else having trouble confirm if they are on 64bit or 32bit Windows?
