I updated my nvidia 560ti to the newest driver. I run a dial monitor setup. Upon reboot, the second screen shows the Intel boot screen, the windows logo screen followed by both screens going black. In these black screens, I can see and use the mouse but nothing else. I tried booting in safe mode but it won't. The motherboard is an Intel BOXDZ68BC. On the board it has an error code 40. I just wanted to reinstall an older driver but can't get the system to boot. Thank you in advance for your help.