I have been thinking about this for a while. A lot of my friends, family, and colleague ask me what is best as an antivirus. I would like to get some feedback from the community on what everyone thinks is the best antivirus they have used for personal and or business use and the reasons why. A lot of people come to this site for answers to questions like this, so I think it's only fair we pool our resources to make the best answer possible. With that in mind.
What is the best antivirus software you have ever implemented for personal or business use?