Occasionally when I go to do something on PDN, my graphics card will crash, i'll get a blue screen (Cant exactly read it though), and my computer will restart. There isn't any specific thing I'm doing when this occurs, It has ranged from clicking the save button to selecting something. It does not do this EVERY time, sometimes i can use it for weeks, even months without problem, but it has become more frequent lately, to the point where I'm afraid to use it at all now. It has done this 3 times in the last few hours. Does anyone know whats wrong, or how I can go about fixing this?