Now I'm more confused. After making the changes suggested in the above post, I could no longer trigger a blue screen.

Started up both clients to find that my 2nd account trial for expansion had expired. (Yes, I made BE's. All of my other toons are undead, so I wanted a change) So I made 2 new undead to test.

I ran around newbie area and Brill, killing things and generally making a fool of myself to everyone around for almost 30 minutes. No problems, no blue screen.

Maybe it is something specific to the Blood Elf area that was causing the blue screen. It had blue screened every time (4 times) before in a fairly short period of time before I posted in this forum.

Thanks for the advice so far. If I decide to buy another copy of the expansion to play the BE's, I'll post again if I encounter the blue screen again.