Yeah, read previous posts. I don't know how this affects game, but I'm thinking of reinstall.yup; after running a search it looks like AVG being a bit over zelous, (it's happened to be before on other games, I believe Assissins Creed also did it.)
Whenever the game hits a checkpoint or I quick load, I get terrible terrible lag and framerate drops into the teens.
In other news.
My avg fps is hovering in the mid-40's with 4x AA, everything on very high, @ 1920 x 1200.
Still having sound issues, I'm thinking of just switching to stereo in creative drivers and seeing if that helps. Gunfire sounds weak and voices are muffled.