I do recommend, ... Spy Bot Search and Destroy as a spyware removal tool.
http://www.safer-networking.org/
It's freeware, it's updated very often, and searches for a huge list of specific spyware, ad ware, and worm builds, and snags the deeply registry hiding things that ad-aware tends to miss. Since he hand codes in the search locations the programs looks for, we know it is only snagging real and legitimate spyware rather than taking a crack guess and removing Photoshop 7 Just my advice, because from my experience, like the virus scanner above, it has never failed me or the people I get to run it.