Microsoft Release Security Essentials 2
Lifehacker reports how they love it and the improvements:
but the addition of an heuristic engine bumps its power up quite a bit. It may be subject to a few more false positives, but you’re much less likely to get hit with malware than ever before.
It also includes some Windows Firewall integration that lets you tweak the Firewall from inside Security Essentials, as well as a network inspection feature that can inspect traffic as you browse
Check out their post here: