How to find the best antivirus all free??

How does this Avast stack up to Norton 360? I got a bad trojan I guess it was and had to get Norton 360 to take it off. Norton does everything. My new computer that I put it on runs great and I get a pop up immediately whenever there is a threat. I wonder if this Avast would do as well.

I haven't had any personal experience of Norton for a while. I can only say that Avast updates regularly, sometimes twice a day, and that it blocks web pages in which it detects malware, seems to work well checking email and generally does what I need. I use it in conjunction with Zonealarm Free and Spybot S&D.

@ Celtic, I just cannot stand Norton. It takes way too much resources and is so irritating sometimes. It pops up even when there are no threats. It will tell me to check my firewalls and stuff, things which are not very significant at all. It is a powerful antivirus but just not worth it. Nice to hear that it has helped somebody. Oh! and almost every software gives a pop up when they detect a threat. @ Owl, Avast is very good and fast. But doesn't Avast and Zonealarm have compatibility issues?? I heard they cause problems when used simultaneously.

I sure attest to that LaDeBoneme. I had been using two and didn't realize they were the same. Had all kinds of problems. COuldn't get my browser to work, and the computer lugged down. It was pathetic. I thought I had another trojan and it was just the two were in conflict. Ghee, it is nice when you know what you are doing.