I just reinstalled Windows to clear all the hidden bits and pieces of my computer. However, I ran into an interesting situation. Before I installed the nVidia driver for my video card (9800 GT), I was getting about 35 FPS on average. After I installed, I was getting about 17 FPS average (which is what I had before I reinstalled Windows). I then uninstalled the nVidia driver, and my FPS went back up again. Does anybody have an explanation for this? (I haven't checked in all other games, but it doesn't seem as prominent elsewhere).
My specs are:
Core 2 Duo 3.3GHz
nVidia 9800 GT
7200 RPM HDD
1440v900 Monitor (not running the game)