The only time I ever contracted any real malware (trojan) was on my old laptop which ran Vista. I was using Google Translate at the time and I tried to click a pop-up off. The Google filter warned me malware had passed onto my computer. I used Norton AV at the time. It didn't find anything even after a full scan. Neither did Spybot S&D. SUPERAntiSpyware actually did find it (this was 10 years ago). I uninstalled Norton and Spybot the next day and never used them again. I've used several AV's since including MSE. Apart from MSE, the only things those other AV's found on my computers were harmless system drivers (false-positives). I don't miss Windows at all.