The biggest security treat sits in front of the computer screen. Brain 1.0 is a good malware detector.
Personally, I wouldn't touch Symantec's products with a 10 foot pole. The Peter Norton products (Norton Commander, Norton Utilities,...) once ruled. This changed when Symantec aquired the TM.
I agree Symantec has gone down hill.. I remember when you HAD to have a norton product...
To throw another couple of nice freeware utilities out:
Avira is a great AntiVirus program that is not only free, but also ranks consistently at the top of independent virus/malware tests. Take a look at the charts on AV-Comparatives - see for yourself where your antivirus program ranks: http://www.av-comparatives.org/comparativesreviews/main-tests
The on-demand comparatives show how the major antivirus programs stack up - look at the total percentage for a general feel for how they rate.
I use Avira and then combine that with Comodo Internet Security (minus it's own anti-virus program) Between those two programs I'm protected from viruses, malware, as well as any program that attempts to go out to the internet without my knowledge.