RE: Which AntiVirus and Firewall do you use?
I use ESET/NOD32. Just got it about a week ago, and liking it so far. It's actually pretty quiet, but will pick up alot of things. (Sounded wierd I know. But, to me, it's working out to be a good AVP). I can get more in depth with it later when I actually know more about it. It's a lot better than the older one I had. Avast Free edition.
I also use Comodo firewall. That thing is pretty amazing, I'll say that. You can actually set it to prompt you when ever a app tries to open. Like, if you sandbox something, it will prompt to open, or like if it's backdoored with a server named "Windows Updater.exe" it will prompt that as well. Providing more protection.
And Flamingworm, with most AVP's you set exceptions lists to your certain folders. If that's what you were talking about. If it was based off of execution, then, I don't know.