Sorry it took so long to get this stuff, Nick.
Right off the bat I can tell you that you do not meet the minimum requirements.
You need an Intel Core 2 Duo at least 2.0 GHz, you have 1.86 GHz clocked somewhere around 1.9 GHz.
The minimum GPU for ATI is an "AMD Radeon 3850", I have absolutely not a god damn clue what the old ATI equivalent is to the new AMD series, but I'm going on a limb and saying that your GPU doesn't support it.
Basically what happened is that the
company called "AMD" made graphics cards which they named "ATI", however sometime last year they decided to ditch the "ATI" brand and just call their stuff "AMD".
The most you can do is update your graphics drivers, use something like Game Booster and hope and pray.