As you found out there allot of opininos and option for you to pick from.
Most the AV`S are ok but can not be relied on alone You`ll be told watch how, you surf where you surf, and when you surf.
And you`ll be OK ,....But that is just not true.
let`s see we need a AV and a fireWall and a malware and a spyware and a Trojen Hunter and a,....HEY why do I need all that.!!!
Well that because no one program can do it all yes norton and some of the other network security suites do catch most,..But
they still miss things.
I`ve used most all there is to use at one time or another!! and I try to use the free ones only because my money is so tight!!!
google these they we help you a free AV you can use is Moonsecure (verison 1) it is free and I`ve been using it for almost a year.
Lavasoft Ad-Aware and Spybot - Search & Destroy these are free too they are for malware and spyware. also Malwarebytes' Anti-Malware it got the last bug when everything else failed!!! it`s scaner part is free fire wall there are free ones of those but i`m not using a free one so i`ll let some one else handle that one.
I just paid for Outpost security suite pro because I got a life time license for a one year Price!!! is it worth it !!! Don`t know yet!!!
Any ways what i`m using is Outpost security suite pro and ParetoLogic Anti-Spyware it`s not free but it`s as good as the free ones and not really and better I just like it better and was able to get it thru a trade I did.Also using Malwarebytes' Anti-Malware.
On the other PC i`m using moonsecure and outpost firewall with Parelogic and Malwarebytes.
I scan at least weekly if not more often if I feel it is needed.
Once again it`s up to the user which program they like!!