If there is a topic about this and it has already been solved then I apologize, however I looked at the PC problems and fixes thread and this wasn't in there.
I got Crysis 2 on launch day, everything worked fine (so to speak), I had no lag or anything at all.

Then starting 2 days ago, I began having lag in SP and MP, but it only occurs when I'm turning the camera (to a lesser extent) and when turning the camera while moving, in which case it completely freezes for a second, and then the screen jumps to where I turned the camera to.
I have a GTX 580 and I thought maybe I didn't have the latest driver, so I downloaded it, and the lag seemed to go away, but now it's back again.
Anyone else have this problem?