Crysis 2 PC Issues help?

I have a Asus G1vx laptop, and I installed crysis 2 on it when it came out, played through it a few times, then didn't play it much. Recently I reinstalled windows 7 on my laptop, and with that crysis. I tried to play it again and it worked fine at first. But I quickly noticed a lag. It isn't a FPS lag, it is more of a game play issue. All the in-game mechanics will get supper slow for a second then speed up for a second then get slow again. This makes the game very hard to play, it doesn't matter if I am at a spot with a ton of NPCs or just starting a level. I have tried many of the basic things stuff like turn off vsync and change settings, but I am wondering if it is an issue with my video card driver or crysis updates(I updated drivers when I installed windows)

Specs:

Intel Core 2 duo@ 2.0ghz

Nvidia geforce GTX 260m with 1gb gddr3

4gb DDR2 ram

this used to run crysis just fine