largey

So recently I gave my laptop to my son to use and since he's had it, it started to have an issue with the 860M Nvidia Driver or the 860M Hardware. I have rebuilt the laptop with 8.1 and Windows 10 and just could not get the GPU to work - I am now wondering if it has ever worked. With it disabled in device manager my son can run some games on the Intel 4600 GPU, So I think maybe it wasn't using the 860M before and when he got the laptop and installed all his steam games, maybe it upgraded or installed the driver. Is there any way to tell if the 860M is working properly ? Will the modified bios help me in anyway to determine that ? If so when can I get it from ? I only managed to get one driver working on it - not even the one provided by Clevo works. It just crashes or hangs as soon as I install it. Hope someone can advise if just to tell me the GPU is fried - the laptop did seem to have the fan running constantly like a jumbo jet! Many Thanks Dave