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Protecting Vistas Kernel
Saturday, July 8th, 2006
According to The Hive, Microsoft is working on a new way to prevent rootkits from occurring in 
Windows Vista. The technology, called Microsoft Patch Guard, will stop unauthorized software from modifying the Windows Kernel. Using Patch Guard, kernel mode drivers cannot write and replace items, and the technology will altogether stop third party software from extending and changing the Kernel (which is not allowed in Windows Vista).
Currently, Patch Guard is available in the x64 versions of Windows XP. It prevents kernel mode drivers from modifying system service dispatch tables, the interrupt descriptor table (IDT), and the global descriptor table (GDT). M-Dollar: Protecting Vista’s Kernel
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