When Avast 5 comes out I could get rid of Spywre Doctor, Firewall+ and ThreatFire. Avast will do it all. I also use the free version of Malwarebytes. It catches everything Spyware Doctor does it just doesn't do it in Real Time like my paid version of Spyware Doctor does. I'm having 2 issues with conflicts between SD & Avast. It's flagging the Avast temp files. Known issue. They just can't seem to fix it.