In response to confusion reqarding MSXML product family categories from MS06-061, released on October 10th, today you will see a new product family called "Microsoft Core XML Services" in your WSUS product synchronization options dialog. In this new product family you will see Microsoft Core Xml Services 4.0 and Microsoft Core Xml Service 6.0 product categories, which are the full names for these MSXML versions.
MSXML 4.0 and MSXML 6.0 are used widely in a broad range of scenarios, by Microsoft and 3rd party applications, so they will now appear under their own product category family, "Microsoft Core XML Services", effective today 11/9/06. WSUS Admin's are encouraged to verify this new product family, or one or both of its' associated product categories for MSXML 4.0 or MSXML 6.0, are selected to ensure uninterrupted synchronization for MSXML security and critical updates for the next, and subsequent update releases.
Bobbie Harder, PM WSUS