My computer is a hp Phoenix i7 quad core with a hd Radeon 7700 graphics card it's only about 6 months old. Whenever I try to load a game or watch videos in full screen my computer crashes to a black screen, sometimes you can hear the audio on a loop and the only way to turn off is to hold the power button, my cpu temps are around 36 degrees and gpu is 30 degrees so don't think it's a overheating issue. I don't know much about computers so apologise if you need more information