Hi,
I sent my game, a simple pacman clone, to a programmer friend of mine who is running Vista 64 Ultimate on a Core2 machine with atleast a 7 series GeForce card and a few Gb of RAM. He has verified for me that he has .NET 3.5 SP1 installed, and the XNA 3.1 Redist, yet my game simply tells him it stopped working on startup.
I've read the dependency threads for this, and it seems that is all that is needed. Has anyone else had any experience with Vista 64 related runtime problems, or methods that I could use to track down what is causing the problem, short of sending him the code and getting him to install XNA etc. ?