So I’ve been running MSE for about a year now, and I’ve got to say it’s been great. Vitrually no annoying pop-ups, daily updates for security, and no issues with viruses all year. I did see the scanner notify me about a number of potentially malicious files, but with very few false positives. I was pleased to hear Microsoft announce that it would be free for small businesses to use for up to 25 users. Make sure you uninstall thoroughly any other Anti-Virus applications like Norton, McAffee, TrendMicro, and the like before installing MSE. You can download it from www.microsoft.com/security_essentials.
