Computer goes to a black screen when playing.

For some reason when playing this game my gf's computer will randomly just go to a black screen. Her computer is still on but her monitor is off and nothing will get it back working besides restarting the whole computer.

It did it like maybe once or twice yesterday but now it's CONSTANTLY happening in the snow zone. And from what I herd, people have had issues when in that zone though I can't confirm if this is what is really happening.

Is this happening to anyone else? And if so, anyone know of a solid fix?

Thanks.