Downloaded today with Galaxy
Windows 10 Pro, 64bit, Intel Core Quad Q9300 2.5GHz, 4gb, GForce 9800GT
Be sure to check here: https://support.gog.com/hc/en-us/articles/213039345
Contact support, too. Of they can't get it working, you may be entitled to your money back. That said, a gtx460 is quite a bit different than a 9900gtx, so I would argue you don't meet minimum specs. It's possible the game is trying to do something your game can't handle.
Be certain you have direct x9.0c.
If you can get to any settings get then as low and off as possible.
But definitely contact support.
I've had zero issues with the 50+ steam purchases. Sure would be helpful if there was any friggin clue as to why it decided to crash.