What's the best free antivirus software?

Episode 1114 (1:35:50)

Greg from Camarillo, CA

Greg has been using AVG and he's ready to move to another option. Leo says he's not much of a fan of AVG, and instead recommends Microsoft's Security Essentials. Windows 8 doesn't need it since it comes built in as Windows Defender. But for Windows 7, Security Essentials is best. Leo also recommends not running in administrative mode, and he should demote his account to "standard user."