Ok, unplug the lower res monitor, grab this uninstaller http://www.majorgeeks.com/files/details/display_driver_uninstaller.html and this wqhl nvidia driver http://www.nvidia.com/download/driverResults.aspx/112201/en-us (you may want to find a more preferred one for your home language, in which case insure it is a "wqhl")
Save both to the desktop (so you can find them once the display res goes crazy) run the unistaller (with restart) remove both the intel and nvidia drivers (AMD common files may be in there) (it might take two separate goes, please select restart each time), once done, run the freshly downloaded driver, if problems persist we'll look else where.