I recently came across a few videos on YouTube where TV stations did undercover investigations for computer repair work. It is amazing how often a non-existent virus gets blamed for problems.
If you ever need computer repair work done and you are not real tech savvy, it pays to get referrals and if the cost is high or data may be at risk, a second or third opinion may be in order.
Do note, that the very small sampling of businesses is not statistically significant to extrapolate how major or minor the problem really is. Although the GeekSquad gets beat up pretty bad here, most of the Geeks are honest people.
Director of Technical Education
Author ESET Research, ESET