Y580 GTX 660M Missing in Device Manager I kept getting bluescreens for nvlddmkm.sys so I uninstalled and deleted all the Nvidia VGA drivers, with the intention of loading the newest official Nvidia driver from nvidia.com. Now after I downloaded the official Nvidia one it cannot detect my hardware. I tried the Lenovo driver but it too fails. I turned off the machine and let it sit for a minute. I then restarted but it was still missing in the device manager. I scanned for new hardware, but it didn't find anything. Any ideas?