Get Ad-Aware Personal SE, and also get Spy Bot aswell - always wise to get two scanners, so when you scan, the other will get the ones the first one missed

Also do a Google search for SPYWARE GUARD, which is a good programme that is a real-time spyware scanner, much like how AVG works for virus, as it constantly monitors the PC's activities to stop spyware installing and getting on your PC - I got it and it runs all the time in the backround, and now when I scan I get far, FAR less stuff found by Ad-Aware and Spy Bot - good programme!