I have found that "Stopsign" works great. It is however a pay real time virus scanner. The bonus with them, is that if you are still having problems after you scan, they will request a copy of your registry and develop a solution for you. I had a Hijack that would not go away, but they found the problem and sent me a custom program to kill it. Took them about 72 hours. You can find them at:
www.stopsign.com.