good day! i owe an asus k73sv equipped with a gt 540M. the problem is, last night, i noticed that my nvidia control panel refuse to open, so i chose to reinstall drivers. but the drivers say that the graphics driver could not found compatible hardware. i tried to enter in device manager, but there i have only my integrated card, no such nvidia..i dunno what to do, i tried almost everthing, bios updates, the drivers from asus site, latest nvidia drives, nothing seems to work.