I know that this post's already here but then I can't get help from those so I ask again here. I've tried to install halo 2 with windows 7 ultimate. the start-up's shown then I chose customized install. after that I chose full install, do not start then something appeared and asked me yes/no question about changing something in windows, I clicked yes. after all of those, nothing happened. I've already downloaded and installed games for windows-live 2.0 and I also have updated it to 3.0 but nothing changed. I never think that my pc is out of spec since I can play dmc4/cod4 well. please help.