I'm trying to run Natural Selection through steam. I've got it set to 1920*1200 Open GL 32 bit. However, I'm getting frequent dips down to 30 and 20 fps. This shouldn't be happening. Say an enemy gets close and starts attacking. Or just many people around at once. The marine transporter WILL trash my FPS when I look at it. Also, If I open up the menu while playing, the FPS also goes south to 30 and 20fps, which I can feel while navigating the server browser. I've grabbed the latest Nvidia, Creative Audigy, and P35 Intel drivers. Defragged in the last 2 months at least. Checked my Half Life 1 files for both integrity and defragmented them in steam. Microsoft Security Essentials hasn't picked up anything, if that counts for anything. Deleted the profile HL folder and let steam re extract the files.
I'm running Windows 7, which I have never really gamed seriously on before. I've got as much stuff disabled as I can in the background. Indexing is definitely off.
I'm thinking about just reformatting to XP? Would that be a good idea?