when i run dirt 2 it launches smoothly but when i start playing it doesn't run smoothly. the car runs like a rubber band (appears) as if it runs then stops and agaim like this.
my system specifications-
intel core 2 duo 2.88ghz
windows 7 ultimate
3 GB ram
If you have a really old video card, then Dirt 2 will not run well. I had the same issue with my Radeon HD 3870. When I upgraded to a 5750, the problem went away.
As Rattman asked, what video card do you have?