I use NOD32, Comodo Firewall, Spysweeper, and Spyware Blaster. With that set up and my surfing habits, I really don't have malware problems. However, I have long been enamored with Spyware Doctor, but have just never put it on my machine. I do feel that it detects and cleans the highest percentage of spyware when compared to counterspy, spy sweeper, pest patrol, etc. And I also feel that if I scan with bothj Spyware Doctor and Spysweeper I wopuld pretty much get 100% spyware coverage. But I wonder if it is necessary (don't think it is). I also worry that it might drain system resources having both. Obviously, IK would not use the active protection in both. That leads me to one last train of thought. Does one do certain functions better than the other? Like is one better at rootkits and the other better at keystroke loggers? Does one protect the registry better or does one protect IE settings and the hosts file more completely? has anyone compared the various protections of these programs to see where each one excels in comparison to the other?