Microsoft has updated its 64-bit kernel protection for Windows Vista, which most of us know as PatchGuard, but which Microsoft calls Kernel Patch Protection. This is Microsoft’s third PatchGuard update, in what has become a cat and mouse game between the software giant and security researchers. The update is a defense-in-depth change that builds additional checks into KPP for increased reliability, performance, and security. It appears primarily geared towards making PatchGuard less easy to bypass from a third party driver perspective.”]