Sunbelt Kerio Personal Firewall - before that Antigum? Outpost both are good IMHO
the biggest security issue is the uneducated / uncaring ( not my PC wouldn't do this @ home ) behind the keyboard i don't know how many times i heard " I knew I shouldn't click on it, but i did anyhow" - you could send out an email with an attachment, but in the email the attachment is a virus do not open, and I'll bet half the PC Users would do it anyhow ......