Avast is a good Antivirus program it can only be used don't he home user setting, if you want to use it commercial you need a commercial license for it. And i cant say out of my 10 years working with Antivirus has Norton ever given me a virus! People who do strange and illegal things might end up with one and blame it on Norton or someone who is computer illiterate might, or just someone how hates corporations. Don't you think if corporations use it without an issue, that its really just fine and its the end users lack of "knowing" as fir firewall, I do not suggest you use Norton for that, that is a CPU hog. ZoneAlarm is the best in my mind there is a free version and a pro version.