I've used both McAfee and ZoneAlarm, and both seem to be quite good. I'd say that McAfee consumes more system resources, but that ZoneAlarm has more annoying alerts. I've also noticed that ZoneAlarm has picked up a few things which McAfee didn't.
I'd say that ZoneAlarm is probably my favourite out of these two. I haven't tried any other firewall/anti-virus/anti-spyware software, so I don't know if there is something better out there.
AVG is good as a free antivirus, but often a little 'behind the times' with definitions. But it's free.
Everyone (including me) hates Norton as it is very intrusive and practically takes over your computer.
Comodo firewall is really good (and free and open source).
Antispyware software that 'catches everything' often 'catches' harmless cookies and 'data-miners' which are actually nothing sinister. So if you compare these products by how much they find, you won't necessarily get the best software.
Instead, just carefully manage your cookies (including flash cookies - go on, wikipedia 'local shared object'), and make sure you know your browser's security settings.
And of course, never run executable files taken from dodgy sites!
I used to use Eset nod32 but found that it was resource hungry
I run a small w2k machine....
I finally uninstalled ALL my anti virus' and in stalled spybot
why you ask... cause ALL the new viruses the 1st thing they do is disable the anti virus engine ...DUH so I'm just careful about what I click on and scan any files I download using the site virustotal.com
this is really a dope service and no it's not my site.....
Spybot is pretty good...
I used to have pc-cillin but I just could not stand it. Because when I got a trojan, it just kept popping up so much that I could not do anything on my computer...
Ad-aware is good too
You really should consider using something other than Norton, because frankly it's crap. Get ZoneAlarm Security Suite, it gives you full control over how programs run, use the Internet etc. And it has antivirus/antispyware tools, hasn't failed me yet (and even on the rare occasions when it did, it was never anything Safe Mode and CleanUp! couldn't fix).
Personally, I use AVG Free on most computers, combined with Lavasoft Ad-Aware SE Personal, Spybot Search & Destroy, CCleaner 2.0+ and either COMODO Personal Firewall or PC Tools Firewall Plus. However, on my Macbook's Vista partition I recently got a free copy of AVG Internet Security 8.0 via TrialPay, which encompasses pretty much encompasses all my needs - I do keep Ad-aware/spybot just in case, though.