On that front, make sure he avoids 'my clean pc dot com', 'double my speed dot com', or 'finally fast dot com'. They're all actually the same company, and their 'free scan' is nothing but scareware designed to spook you into buying their expensive cleaning and online service contract. I've seen stories about it coming up with hundreds of errors on a machine with no Internet connection and nothing on it but a clean install of the O/S.