Unknown client crash

Ok, here's a rather strange issue I have:

Twice now, for some unknown reason, the DDO:EU game client would suddenly freeze up, my dvd drive would begin spinning for no reason at all, and then the game would crash. Nothing pops up, the drive stops spinning, and there isin't even anything in the windows event viewer describing an error with the client!

The first time this happened, I ejected my DVD drive, and I think that screwed up my computer to the point that I had to restart it. I am not sure why it happens because I have VERY LITTLE information regarding the matter, but all I can say is that im running Windows XP SP3, all my drivers are updated, defragmenting doesnt work even when I have 15% drive space(Thats another problem by the way), and it doesn't matter what CD I have in at the time; I never had any windows installation CD'S of any kind, and I have no idea why this event happens. Its not a system scheduled activity, because these two events happened at the same time.

Any help here?