Does anyone else have trouble running this game?

I've downloaded and bought this game but it runs super slow and keeps stopping and starting. Any suggestions?

I have the same problem but only on my xp computer. It works just great on my vista, I have written to customer service and they said they answered it but still cannot find the answer. I wish someone would help. I updated all the drivers and it still does this and it also has a box around the clothes like if the model was wearing a red top and blue bottoms they all have a blue box and a red box around the certain color of clothing, I wish someone would help as I bought this and still nothing resolves when putting the cd in.