Games keep not responding/Crashing or Freezing

My Alienware 17 laptop keeps crashing/freezing while playing steam games (Or using applications. 

Not all games crash, but most of them do like Dota 2, Saints row the third, Saints row IV and much more. Either, when i play Saints row the third or IV, id always get a:

*Stopped responding 

*Freezes the screen, but can still hear the game running

*Freezes for 3 seconds then loops the sound for 1 sec and closes to desktop with no warning.

I came across a few BSOD's (Blue screen of deaths) while playing games or shutting down my PC.

One of them was cdd.dll and others that i cannot remember. This was when i started up Saints row the third.

How can i fix this? Please help 

Thanks.