Have you installed the latest
patch? There is another patch expected soon, but it is already later than initial guestimates, so I wouldn't hold my breath waiting for it. Have you checked for updated drivers, etc? Shut down all non-essential programs (especially anti-virus) before running the game? Checked the
Technical Support FAQ?
These are random crashes I take it, rather than associated with certain skills or locations? Try running the configuration program and switching to software mode (or a different mode) and maybe reduce the resolution.