A Free AntiSpyware application:

Recommended by many, I have used it myself recently battleting a Malware that took me an entire day to defeat. "SuperAntiSpyware did the job".
-Advanced Detection and RemovalDetect and Remove Spyware, Adware, Malware, Trojans, Dialers, Worms, KeyLoggers, HiJackers, Parasites, Rootkits and many other types of threats.
-Light on System Resources and won't slow down your computer like many other anti-spyware products.
-Won't conflict with your existing anti-spyware or anti-virus solution! Repair broken Internet Connections, Desktops, Registry Editing and more