You are going to have your people who say this is better than that and that is better than this, much like cars, chevy is better than ford, ford is better than chevy, etc, etc. I personally recommed Symantec Antivirus 10 Corporate Edition. I have never ever had a problem it. I have always had a FW called Zone Alarm and I havent had a virus since I dont know when. Remember Sasser? I didnt get that virus becasue I was behind my software FW, HW FW didnt mean nothing, it got thru as with thousands of other corporate servers around the world. This is why you need HW and software FWs to have a backup. Just as a test, I disabled ZA and no sooner than I get online, I was hit with sasser. If you keep a software FW and hardware FW like your router, a good AV, run regular scans with spyware programs, you will be just fine. Now watch, someone will come on here a go completely against what I said, but thats their preference. You dont see me in the spyware section all the time do you like a lot of people on here are. And if you do happen to get either a virus or adware program, its the users fault for downloading it, installing it, connecting an infected pc to your network and not updating file definitions. If you do get one installed and running, then you might have some work to do. So its basically up to you. McAfee is good, Hotmail uses it to scan their attachment but just because they dont use Symantec, it doesnt mean it isnt good. They just got an agreement with them to scan them, money, money, money. If they ever drop MA, who knows what will take its place.