@Sunil Thanks for the detailed reply. So what you are saying is that, Norton Antivirus due to it's extra plugins, does a more thorough job protecting against viruses, albeit at the cost of system speed. But should it not be 'Symantec Antivirus' that is more thorough, since as you said the corporates have more "dire" needs. The lack of a nice GUI in a corporate product is totally understandable, but why less protection (I assume that because of less plugins)?