It's a Win 7, 64 bit, AMD processor, nVidia graphic,s
I never use the Program Files for my game folders. That's an automatic no-no.
Just every once in awhile it does this. It's the only game I have trouble with. Wasn't sure if it was a GOG thing.
Have you updated your Nvidia card drivers to 310.90? Your sound card drivers? Are you running the game as Administrator?