Which functions of a firewall are still necessary when running Process Guard? Anything else that's a good idea to run in conjunction with PG? I figure an antivirus scan, spyware scan, trojan scan, and rootkit scan are all good ideas. But scanning isn't preemptive. I'd like to close the holes. PG seems to be pretty comprehensive, but what is it missing? Or would PG usually be able to fend off most attacks on its own?