Im posting this for the last time. Any pc wizards wanna chance to shine, here is your chance.?

im trying to run 2 games, (stalker shadow of chernobyl and chrome).use both do the same thing. Iv tried running in both compatibility mode and as administor with no joy. I start the games then the screen goes blank (lg3000) and a message says invalid format. Now a third game (fifa08) i got around by changing in the nvidia control panel changing my settings from hd1080p to generic monitor. But this doesnt fix the other 2 games. And i dont need an upgrade- windows 7 64 bit ultimate, 4 gb ram, geforce gtx 460 1gb oc and intel core 2 quad. Please help someone.