I have to disagree with that list. It is pretty much backwards in the real world. There was talk about that PC World test at the other forum I frequent,
PCMech. PC World did not take into account the other problems that McAffee and Norton cause such as driver issues, random reboots, extremely slow boot times, very slow shut downs, application errors, etc.
Personally I use AVG Free. It uses barly 700kb of ram and has never given me any trouble. I have never had virus problems, ever. I used to use Mcaffee and I experienced all the problems I listed above and more. When I removed McAffee, it was like I had a whole new system!
Here are some threads:
http://forum.pcmech.com/showthread.php?t=129451
http://forum.pcmech.com/showthread.php?t=128906&goto=nextoldest
AVG, Trend Micro and NOD32 are the ones I would use. Yes, Norton and McAffee can detect viruses, but I would not receommend either of them to
anyone due to their sloppy programming and exhorbitant use of resources.
A note on AVG, though the PCWorld test ranks it last, that is far from the conensus of those at PCMech who have been working on PC's ever since they've been around. PCWorld knocked AVG because of it's "clunky" interface. The interface may look like Windows 98, but it is far from clunky and it is most definetly functional. AVG is recommended the most because it
does work and it is
not a resource hog. Best of all, it's free.
Then there's spyware. Adaware, SpyBot, and MS Windows Defender are about all you need. Run scans periodically and you shouldn't have any problems.
The biggest thing of all is browsing habits. Unless you click on every single link you ever see, go to every shady looking site, open every email attatchment you ever get, or download every .EXE file you see, the chances of you getting a virus is small. Just use common sense.