I don't know why but when I play games on my computer, I notice that it lags and the response time is very slow. I have a Dell Inspiron 8600 and when I try playing old games like Halo CE, it lags a lot even when I'm in campaign mode. Once the game starts, the game starts to lag and the sound becomes choppy. It is impossible to play. When I press w(to walk forward) it takes 2 seconds for it to walk. The music and the action becomes so slow. Any reasons or ideas why this is happening? I have a Dell Inspiron 8600(2005 computer) that has NVIDIA GeForce FX Go5200. Thank you.