Hey, I've got the same problem. I just installed the game and it started to crash as soon as in the creation of the character and starter zone.
I started the game as admin, its is on the D drive, I used the win 7 and XP (service pack 3)-compatibility and also used the verify tool without any found issues.
I don't get an error message, mother just kicks me every time.. while running around, while taking a quest or whatever I'm doing.
It crashes regularly every 5-10 minutes im in. Any more suggestions?
edit: I've also put the game as an exception in my antivirus without success, so I'm completely out of ideas.