|Your system doesn't meet the minimum requirements. If you have the box, the requirements should be printed on it. |
CPU: 1.0GHz (XP), 1.3GHz (Vista)
Memory: 512MB (XP), 1GB (Vista)
Video: ATI Radeon 8500 or better, nVidia GeForce 2 GTS or better (XP);
ATI Radeon 9600, nVidia GeForce 6200 or better (Vista).
NOTE: if you have a non-T&L capable card such as Intel Extreme graphics, you need at least a 2.4GHz CPU.