I haven't run any anti-virus software for at least the past ten years either at work (Ubuntu), on my laptop (OSX) or at home (Windows 7). To the best of my kno

I haven't run any anti-virus software for at least the past ten years either at work (Ubuntu), on my laptop (OSX) or at home (Windows 7). To the best of my knowledge I've never succumbed to a virus and have certainly never seen any indication that I have! I'm cautious with what software I choose to run and do cursory checks of links in e-mail/online. I really only run business related software (Sublime Text, CS Suite, Browsers, Autodesk Inventor, Eagle CAD, etc) and any games I do play (rarely!) are via Steam. All machines are used regularly depending on where I am and what I'm doing. I'm the only person who uses any of them. I generally only re-install when I'm replacing a machine or substantially upgrading it (perhaps once a year or so).