Hi I have a problem with my pc after opening the browser (mozilla) my laptop freezes and nothing can be done just disconnect it from the network or turn it off with the on / off button. It's only when working with mozilla while playing eg .And I still have a problem with the graphics control, I can't open the graphics at all, I have two integrated Ati Mobility radeon hd 4250 and a normal AMD radeon HD 6370M system running on the integrated one. Thank you for the advice.