Technet Spotlight On Demand Video - Mark Russinovich - Windows Security Boundaries
In this session, learn what constitutes a security boundary; get a tour through core Windows technologies, including user sessions, Code Integrity, PatchGuard, Service Security Hardening, and User Account Control, to learn where Windows currently defines such boundaries; and gain insight into why application compatibility and user experience make defining boundaries much more difficult than it might seem.
https://www.microsoft.com/emea/spotlight/sessionh.aspx?videoid=993