When I bought the game through Impulse it was running smooth. But after I saved the game and came back the next day, it started skipping. Since then its been getting worse each time it starts. Now the game even takes about 10 minutes to start up. It used to be instant. It has also started slowing down even when I'm trying to load a game or simply pressing a button on the main menu..annoying. Not only that the start up menu that shows up before it puts you in game has disappeared. I have read many posts about issues like this but only during single player matches. I also have the problem of the game skipping during single player game play. MY slight fix for that is to just turn off Bloom (All it does is add a glow effect and somewhat hide the square-like edges. The skipping is still there, Its just less intense.
I get no error screens, And I eventually get into the game....but it just lags to much for me to bother getting into it. This Issue I am having also relates to another game I am playing... It also takes forever to begin.

Does anyone have any idea on a fix for this?

Specs:

WIN7(64BIT)

AMD PHENOM II X4 610 Quad Core PRocessor

8GB RaM

ATI RADEON HD 4600 series