Games don't start up proplerly. Help.

[Retroness]

I can't seem to get any game running. Any time I try to start up a game, the screen remains black. It doesn't crash and I can still hear the title screen music. With Star Fox Adventures however, a low detailed version of the title screen occasionally appears in the corner of the window. I have tried everything I can think of and nothing has worked. Does anyone have any fixes for this problem?