Appdefend x64 beta was the first program that i know off that can disable patchguard to effectively hook the kernel on 64 bit computers. The resoning behing this is that if Jason can patch it... what will stop hacker from doing it. Very few thing really. Appdefend maybe Uninformed published an interesting article about the inner working of patchguard and some way to circumvent it with proof of concept code. http://www.uninformed.org/?v=3&a=3 This is prooving that Jason's rigth and we still need non microsoft solution to protect our kernel. A very few ppl will actually understand the paper as it's very thecnical but it show the kind of devlopment which is behind such a great product. Maybe someone can even find new way to disable patchguard in the event of a service pack.