When dealing with spyware, it's best to use a variety of spyware removal tools to do so. They know best on which files are "suspicious" or not. I use ALL three of the programs below, plus the new "Microsoft Antispyware Beta". (The "beta" program is best to wait on at this time, but I still like it.) Here are links to the three programs I'm speaking of:

Ad-Aware">http://www.lavasoftusa.com/support/download/]Ad-Aware