im going to buy a new computer in the next day or so and was wondering whats a good anti virus? also looking for suggestions on a computer..i like dell and have had pretty good luck with them but keep in mind im technically challenged...i still type with one finger.

it will be used mostly just to surf but my kid does 99% of her school work on the comp...i dont need the supper high end model with all bells and whistles and just need the tower i have every thing else...im looking at some of the $299 price towers at best buy and some suggestions from you techy guys...id like to stay in the 2-400 price range if possible...thanks guys.