Keep on the good work - OS reliability is if prime importance. However, the basic OS principles of levels of isolation are known for more than 20 years. I learned it from the (excellent) OS textbook from Lister (1st ed. from 1975 - an OS called Windows 1.0 was released that year) http://www.amazon.co.uk/Fundamentals-Operating-Systems-Macmillan-Computer/dp/0333598482 So, some decades of blue screens later hopefully OS theory will be applied more rigoursly...