I was looking for HIPS. Asked you nice people at Wilders. Many good replies. Many different suggestions from you, like Prevx, Cyberhawk, AE, SSM, PS, DSA and so on. But most of you gave me advice to use it together with sandbox. At first I didnt see why. To make the story short - I kept on reading and now I can see why sandbox may be a good idea. I will use it as a part of my layer protection. These are often mentioned: Sandboxie, DefenseWall, GesWall and Bufferzone. I struggle to choose between those four. From what I read they all offer good protection and are easy to use, even for a novice. So what to look for? I dont know if it matters, but I have two user accounts, use Firefox and Thunderbird, and I use XP, not Vista. Does it matter which one I choose? Whats the difference? Almost forgot, Im only looking for free version.