Jonathan's team from MSRC, researches potential mitigations and workarounds as part of the comprehensive investigations they do for each security bulletin. They regularly discover information that could help customers better understand how to protect themselves via mitigations and workarounds. Here are some information about the Virtual PC and Virtual Server bulletin and some "best practices" guidance to help protect yourself from this class of vulnerability. http://blogs.technet.com/msrc/archive/2007/08/23/technical-tips-and-insights-on-ms07-049-and-ms07-044.aspx...(   read more »