I've been seeing so many positives about the Comodo firewall and was wondering: Which is more effective (i.e., stops trojans, prevents leaks, etc.) and efficient (i.e., low CPU utilization, moderate memory usage (less concerened about this, within reason), doesn't cause BSODs and/or conflicts, etc.): Kerio 2.1.5 (with BZ's enhanced ruleset) or Kerio 4.x free (with BZ's enhanced ruleset) or Comodo 2.x I know there are many variables included within this question and answer (i.e., what else are you running, behind a NAT firewall, experience level of the user and how they respond to firewall prompts, etc.) but wanted to see what people think and if there is any empirical evidence to support recommendations/answers. Thanks for everyone's input.