Newbie

Hi, I'm new here and really need help/advice. I have an m17x r4. I switched it on today and the gpu started acting up, I have 2 graphics card. an intel one and an nvidia 660m. The nvidia one is not showing up in devices. and when it does (after clicking, show hidden devices) it says in the device status box "Currently, this hardware device is not connected to the computer. (Code 45)To fix this problem, reconnect this hardware device to the computer."I don't understand what this could mean or how to fix it. I have tried updating the drivers from the device manager screen but it doesn't help. Any help would be much appreciated. thankyou so much