I use only AVG free, and use no internet security suite at all, though Vista does have windows defender built in.
Unless you are going to use the internet to view everything you've been advised to stay clear of, then you really only need AVG free.
The Pro version is basically just a security suite.
If you type 'msconfig' in the 'run', you can configure which programmes you need to have opening upon startup. I have windows defender, and AVG, and nothing else.
I've had more problems with windows updates corrupting files than I ever have from a virus.
I'm getting the impression that the virus makers are targeting the kids websites, a neighbours pc just wouldn't work, they took it somewhere to be fixed and they told them that there were over 150 viruses that had all originated from Moshi Monsters, kids will click yes when a box comes up, just to get it out of their way so that they can play their game.

Comodo is the best firewall. It isn't the best AV, but it is up there. It is now down to personal choice as either will do the job. I use Comodo AV now, as it is easier to manage in one package, for me.
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