I used to use NTL Netguard unitl I changed to Norton Antivirus 2007. Netguard was free for me, being a NTL/Virgin Media customer, but I think the quality of my protection has went down after installing Norton Anitvirus. I only changed after credit card fraud

I use norton antivirus, it's very relaible and i havne't got a single virus yet!

Eset NOD32

I am using Mcafee on my machine... and its good

I use MAcfee 2008. It works fine for me and i have no problems what so ever. Also Noton is also pretty good. all you need to do turn on the auto update and you dont have to bother at all.