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[Andrés]

I don't think free antiviruses are that bad. And sure it's better to have a free one than nothing at all.
I can't spend much in an anti virus, and with our devaluated exchange rate anything made by a foreing develorper is too expensive. So it's either a free one, or a pirated Version of a comercial one.
I've been using AVG for some time, and I'm quite satisfied with the results.
For example yesterday it detected two Klez Messages in my inbox. (Not that I wouldn't have recognized them without it)

Anyway the antivirus is just the second line of defense, the first is being careful with any file you recive, download or get on your floppy drives.

BTW home made mayonaise is good when its fresh, and it's actually the exemption that confirms the rule that says homemade food, free of artifical flavors, colors and other additives is healthier.