Hi all,
I'm not sure if this is old/new info, but I recently downloaded a program called "Ad Aware" that acts a lot like Spybot to clean up files infected with spyware. I did this and came up with 261 files that Spybot wasn't catching. My frame rates bounced back up to where they used to be making me very happy. I thought I would pas this on for anyone interested in taking a look. This a freeware and you can find it at:
http://www.lavasoft.de/
and click on Ad Aware Personal Edition (free version).
I wanted to forward this info becuase I was really getting sick of worsening gameplay until I got this. I hope it helps.