Hello guys.So I've had a Lenovo z51-70 for a little over a year now.A few weeks back,when I was playing a game,the laptop turned off all of a sudden.When I turned on the laptop after that, I noticed that whenever the graphics switched to the AMD,the laptop kept shutting down(improper shut down).I uninstalled the AMD drivers and tried to reinstall it,but the driver complains thaterror with hardware.I used system restore and even booted from an external hard disk,yet the GPU isn't being recogised.By now I think that it isn't a software problem.Any help guys?My dad's ripping me a new one saying that its because of all the games I have installed -_-.