When I started this game it began flawlessly and played well for a few minutes past the tutorial.

Unfortunately when I exited the game, I came to see a black screen.
I tried to use alt-tab, nothing happened, then tried alt-F4, nothing.
Then Ctr-Alt-Del to bring up the task manager, nothing.
I waited for about two minutes to see if it would go to the desktop as well, but nothing.
So I was forced to turn off the pc manually, and upon startup my computer checked my drive for errors.

Any thoughts?

My system is a HP with 3 gigs ram and Windows XP OS.

Motherboard is a AMD Athlon Processor

Video card is a NVIDIA GeForce G210


EDIT: This was with the first release version. I just downloaded the patch but I am a little reluctant to try it out seeing as the patch notes don't mention about a exit crash, so to be on the safe side I'd like to wait until someone can contact this topic with information.