also try disabling Tripple Buffering if its on This is on your Graphic Card Application, if you have ATI Graphics Card then its the Catalyst Control Center i have 2 hard drives and one off them with full install of vista second vlited.... all the other are comon drivers .. etc(lost planet is dx10 game) ill try busines... my harware is.. core 2 quad 6600 8800gts 4*1024 memory... but i dont like full vista vlite rules