Microsoft Security Essentials antimalware definitions are now available via WSUS. “MSE is a core antimalware service for consumers and home-based small businesses released in Sep 2009. This was done because academic institutions around the world (particularly in Asia) provide students with low cost or free internet access and provide students with update services through WSUS. Many students are protecting their computers with Security Essentials, and universities requested that the definition updates be provided via WSUS. With this change, there’s a new product family (Microsoft Security Essentials) and product name (Security Essentials) WSUS in the admin console. Note that the addition of this product family and product name is only to accommodate the definition updates for Security Essentials. This isn’t a replacement or a rename for any current Microsoft a/v product,” reports Microsoft.