Help Interpreting BSODs

[hellic]

I had one BSOD and one Red Screen of Death today, and I think both were titled "page fault in nonpaged area". I have Vista Ultimate x64 with SP1 and all updates, and I have no idea why these crashes are occurring. Please help!

 

[woody1191]

Your MiniDumps cite Kernel Drivers and 1 process noted is Assassins Creed.

Do these BSOD's occur randomly?
When do they seem to occur?
What Programs are running at the time?

To start with you might as well run Memtest86.

Memtest86 Instructions
Download the pre-built version of Memtest86 (Link Below) and burn it onto a CD using ISO Recorder (Link Below) other ISO burning software will work as well (E.g. Nero). After this boot off the CD and start the test going and let it run for 3-5 hours (Minimum of 7 Passes) or Overnight which is best.

Memtest86 - http://www.memtest.org/
ISO Recorder - http://isorecorder.alexfeinman.com/isorecorder.htm