There's an MBSA chat tomorrow at 2:00 P.M. Pacific Time (22:00 UTC/GMT). You can read more about it on the Microsoft Chats page. This is a very important tool for determining the security status of your workstations and servers.
MBSA (Microsoft Baseline Security Analyzer) v1.2
Join us for a discussion on MBSA, a free downloadable tool to help you establish a baseline of technical security for your Windows Servers and Clients.
Here's a link to MBSA.