SHADOW_X'S PROFILE

HI
Sometime in past I downloded and instaled rpg maker vx,xp and 2003 and after that non of 2003 games isnt working....Whenever I start any onf 2k3 games screen goes black and I cannot exit game with ALT+F4 or CTRL+ALT+DEL and must restart PC manualy.Before I instaled this programs games worked normaly.I even unistaled all prograsm but games still dont work.Any idea how to repair this?
I am using Win7 Ultimate 64!