Say what? I've been hearing for some time now, that Microsoft Security Essentials is a full virus/malware protection tool.
I've been using it for months with no infections showing up.
Yup, you made me take a closer look. That must be the “Windows Defender” portion of the Microsoft Security Essentials. News to me. I wonder how long it’s been there... ;-)
It seems to be turned off on my home machines, since these get to use Symantec for free, courtesy of my ISP.
I won’t hazard a guess about how good Microsoft is at AV security.