Urgent help needed... problem with opening programs/games

[stealthstud]

hey guys. i built a custom computer for being able to play high definition games and do normal comp stuff at the same time. However, one night, whenever I open a game that takes up the whole screen, like in Guild Wars and Warcraft 3, my program hangs almost immediately and my computer then hangs too. A noise emits from the computer when this happens. Can anyone help me eliminate this?

[Panama Red]

Let's keep it to one thread per problem. This one is closed.

-------------moderator-------------