blue screen of death frequently

My father is having regular (once every week or so) blue screen of death errors. He isn't at the computer when they happen. I would like to see if anyone can take a look at the dump file(s) for the root of the issue. The dump files can be found at http://rapidshare.com/share/322F3FF41DCE0C7F22CB34977062CCB3.

Thanks,

Jeff