I've just been experiencing the Page Fault in non-paged area - nviddmkm.sys error, after having moved to PowerDirector 16 and updating my nvidia driver. After spending sometime googling and looking throough the forum somebody mentioned:
unticking the hardware acceleration box in Preferences
I was getting the blue screen pretty much every time I used a transition, and the above seems to have fixed the problem. Keeping my fingers crossed, hope this helps somebody.