game crashed.

I have completed game and was in brothel, then came out and started back tracking, was only playing for about 2 minutes the game screen went black but could here me still doing...

Games been running very well, I'm running on full settings sound and graphics excellent.

However I got to the end and credits then you end up in brothel and I got to the fourth booth and all I got...

When I try to come out of game, game minimizes to desktop but mouse pointer gets stuck in corner of screen and unable to operate mouse after going to desktop via Windows key or Start Task Manager.
I...