I recently upgraded my Nortons to the $50 package and had nothing but problems. I should of just kept it basic. I can't even seem to get Nortons off the computer now. When I try opening an existing .xls file or .doc file, it does a virus scan and take about 5 minutes to come up. I am running "eTrust ezAnti Virus" now. It's a free version I found through the MS website. Where I starting to have problems with Nortons is when I went from using Windows ME to Windows XP....well I will say when I started having more problems.
Stay away from Macafee too. It came on my Dell computer. When it expired I just resubscribed - and had nothing but problems from then on. I searched their website and found many others with the same problem. I finally gave up and bought Staples/Panda. So far it works great.
I'm suprised to hear the "norton is the worst" comments. My 2 friends that are computer techs both say that norton, which is really Symantec, is the best anti-virus software around. I just the other day updated my Norton Internet Security as my "free trial version" was expiring. I also had the Symantec "corperate" version on my old computer. Worked well there too. Both versions have Firewalls built in.
I also run Zone Alarm Pro. I have heard how it's difficult to run but I like the fact that it alerts me when other programs are trying to access the internet. I was able to actually stop a couple spyware programs on my old computer that way that were not being dectected by any of the other spyware/adware programs.
The only "free" program I have is AdAware. It always finds things on my computer that have found their way in.
I have been advised to never trust a free anti-virus program. You get what you pay for....