I uses ProcessGuard free and I think AppDefend fills up some gaps on their protection capability... together...they makes a very effective weapon for blocking and preventing varieties of harm that could possibly happens to our pc's. I just use the free unregistered version of Ghost Security. Actually as a suite, I don't felt comfortable using it...and I have to disable RegDefend coz I'm not very familiar with those hard to understand registry terms that I might end up blocking or allowing something that I couldn't fully understand. I hesitate using REgDefend...this might be more suitable for advance users and not for ordinary pc guys. But I know how powerful it is, and it is really effective. How about if AppDefend was separated from RegDefend? To make it a single protection software? Maybe, some like me wants only the AppDefend software instead of having a suite that only eats up some ram and system resources.