Spy Sweeper is, in my opinion, the best and easiest to use spyware/malware/scumware/trojan detector and remover there is.
I recommend it to everybody.
I was sold on Spysweeper after having set up this laptop for a lady in town. I tried it out for myself and really liked it. Picked up alot of stuff Spybot S&D (which I had been using, updated frequently) didn't even see.