Some very good spyware removers, IMO
Also, AVG is a great free anti-virus to have. It gives you full protection and it's free. Can't beat that.
On a related side note, I highly recommend that anyone needing to clean-up their computer, download and try Ashampoo WinOptimizer
. Just register for the free trial(its worth it) It cleans up junk files on the hard drive, registry, and a lot more. I noticed that everything moved faster and smoother after doing everything this program offered