crashing issue

[Daeminff7]

Hey there p1999'ers

I'm having an issue where my client just shuts down, instantly, no warning, no error message - I'm running on Windows Vista on a dual core Pentium processor, anyone else having this instant client exit problem? Seems to be happening on completion of a spell cast most of the times, also all 3 times ive been engaging the guards near the wizzy Spire in NK.

Anyone? Thanks.