I 'use' AVG 6 free although I don't actually use it, I just install it and then disable it from starting. Habit I guess. And I never get viruses or spyware. A firewall though is essentail and I use Zone Alarm.
A friend got a new pc which I helped install that came with a modem. 2 months later I had to clean-up his moderately infested machine. He couldn't tell what was an ad and what was the site. He'd just click and install everything because it looked cool. He had all sorts of weirds cursors and things which inevitably all come with spyware.
Another guy who's pc I cleaned up was the worst I've ever seen. I think his sons were on warez and porn sites because he had it real bad. He'd just dial into the net and immediately a page full of child porn would pop up. He had a dialler installed that would dial premium rate sex lines using the modem which worked in all major first world countries, but fortunately not South Africa.
Buts its true what stoke and wamatt say. Just a bit of common sense is all thats needed to avoid 99% of the nasties. For the pc illiterate though anti-virus/malware is essential and a good firewall. I tested this and it takes about five minutes for an unpatched, unprotected Windows XP box to get 0wned.
For antivirus I would recommend AVG 7 Free. I once tried another free one called Avast Personal which had spyware removal as well but it turned out to be the most annoying software ever written. Besides adding about 5 icons to the system tray every time you went online it would pop up a little window and a voice would say 'Virus database has been updated!'. No thanks.
I'd never use Norton Antivirus because it's too much of a system hog and seriously affects your system's performance. Also a vulnerability has just been discovered in Norton
which could cause it to execute the virus its scanning.
For a firewall I'd recommend Zone Alarm. I've never had a problem with it and it seems to work perfectly once you've trained it.
Also be sure to dump Internet Explorer and Outlook / Outlook Express and use Firefox / Opera and Thunderbird / Eudora instead. New security problems are continuously being found in IE and Outlook because of their integrated ActiveX technology, which other browsers / email don't suffer from.
For spyware removers I use a combination of Ad-aware, Spybot S&D, Spyware Guard and Spyware Blaster. I've been meaning to check out the MS one as well. Always check up on a spyware remover before you install though because half the ones out there just install a new batch of spyware after they've cleaned up the ones they found.
Alternatively just use a recent Linux distro or Mac OS X and you shouldn't have a problem
