http://www.microsoft.com/technet/security/advisory/932596.mspx Microsoft Security Advisory (932596) Update to Improve Kernel Patch Protection Published: August 14, 2007 An update is available for Kernel Patch Protection included with x64-based Windows operating systems. Kernel Patch Protection protects code and critical structures in the Windows kernel from modification by unknown code or data. This update adds additional checks to this [ Read More ]