Free anti-virus packages generally work well. Paid-for versions may have bells and whistles such as privacy protection. I moved away from AVG (free) because they made it nag-ware and upgrades quietly defaulted to the paid-for version rather than the free version. I switched as soon as I discovered MSE and haven't looked back.
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Our democracy is but a name. We vote? What does that mean?
It means that we choose between two bodies of real, though not avowed, autocrats.
We choose between Tweedledum and Tweedledee.
Helen Keller
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It Ought to be Easy | Greasemonkey scripts