Thanks for the response,

I have made sure that all of my graphics cards were up to date and also I have uninstalled/reinstalled the game to make sure everything was default settings. I have tried running it in both windowed and full screen mode just to check.

quick mention that I never had problems before when I first got the game and had bought a brand new computer to make sure it met the requiremnts.

Lastly just to mention my graphics card is a ATI Mobility Radeon HD 5650 and i'm running on a Pavillion dv7