So I bought my computer from best buy last may and now it has this virus that keeps popping up saying I have a virus so I buy the software.. I already have anit virus protection but apparnetly this isnt good enough.. anyways Best Buy is telling me they want to charge me 199 for a diagnostics fee plus an new anti virus protection.. they also said that I could get the anti virus and it may "heal’ the computer… please help me I know nothing thank you~