Spybot - Search and Destroy

If any piece of freeware deserves the name of a would-be James Bond flick, this is it. In addition to removing invasive programs, the added Secure Shredder function absolutely annihilates troublesome files.HijackThisThis lightweight program offers a simple, powerful remedy for the pesky spyware and adware that manages to get past other tools. Novice users should be mindful about what they're tossing out, but this is ideal for the infection you just can't seem to shake.

Spybot - Search & Destroy