Hai Asus users.. Need some help with the gaming on my 42Jk.. i'm using Ati HD 5470.. when i play any kinda of game like COD or prince of persia or even PES my lappy will hang suddenly.. this happens everytime i play anygame... and then i have to force reboot but pressing the power button for some time.. can anyone try to help me.. is it my power settings.. the settings on the game are default.. need help please...