I've used Norton a fair bit (when I say used I mean it was running ;-) ) At the moment though as part of the uni's IT suite I have McAfee for free. I cant really say if its better or worse though none have ever found a virus. My mum uses Kapersky on her laptop it has found a lot but hopefully that is down to the users. On my other PC I run Avast it has blocked things and touch wood in the 4 years its been on the machine its never had a virus (or none that I know about

). Out of the packages that I have used I think I'll be putting Avast on this laptop when McAfee runs out it seems to be the best but I'm not an IT expert.
I have not used Norton for years but Norton was the first AV I ever purchased..... that was a lonnnnnggggg time ago though
When Norton was up for renewal I felt that I wanted to find out if there was a better alternative out there and as you do, I read as much information as possible on the subject but at the end I felt even more confused

..... lots of people would recommend Norton, others Mcfee, etc. Then, I had a thought, finding out what "the enemy" thought of it

so I followed 2 or 3 hackers forum

and the answer to my question was clear

Norton was the hackers fav AV to disable without no one knowing. I'm glad to say that most AV don't allow that now. So, in view of the new information I bought Karpersky and installed it in my other pc..... more or less at the same time one of the guys let me have all the tools to put the latest backdoor together.... no AV new about it yet

so I downloaded a new backdoor via email on both computers and the thing managed to disable the AV on both PCs

..... now the difference is that Karpersky pick it up after about a week but Norton never did, well, my licence expired after 5 weeks or so and in that time it never picked the backdoor and I did several scans.... No idea how good Norton is now but the best lesson I learnt while trolling those forums

was how you pick a virus..... and the tricks these people do to spread a virus. So, having an AV these day is just essential.
Not sure these forums are still allowed, I doubt it, but most of the people there had a challenge and the challenge was to bypass all the big corporations behind the AV and also Micro$soft. There were also a few nasty ones that would take pleasure in ruining somebody's day.