I'm currently using BZ free but am thinking about trying Sandboxie, since I understand the free version is very similar in operation. I read somewhere that the newer versions of BZ use the more secure Ring0 hooks. Anybody know if Sandboxie is using them or the supposedly less secure Ring3? I'll also add that talking about Ring3 or Ring0 might as well be speaking in Martian as far as I'm concerned. I just know one is better than the other.