How come my video driver crashes and causes my screen to go black?

Q: I’m trying to sort out my (practically new) Dell studio laptop. There seems to be an issue with the video driver because the screen goes black and sometimes recovers, in which case the mouse pointer is HUGE or sometimes I have to restart the computer.

It’s a really annoying problem especially considering how much I paid and how new the laptop is! The other thing is, I really don’t want to send my computer away because I have so much stuff on it already! Can anyone help me?