Okay, just to let everyone out there know, the Vista memory diagnostic sucks. I ran it three consecutive times, after random reboots and crashes, and turned up no results. I booted up a copy of Memtest86, and within minutes found more than 20 errors. A word of advice: don't waste your time on the Vista diagnostic tool, as it doesn't know malfunctioning memory from a pop tart. Memtest86 can be found here: http://www.memtest86.com/
Or perhaps try http://www.memtest.org/ for memtest86+ which is based on memtest x86, only a little more up to date.
