In device management is there a device that is not recognized? it will have a ! and a yellow triangle around it. It's most likely just unknown to the system what it is. IF it is there install the driver manually through there. If not let us know so we can keep working on it.
EDIT: be sure to fully update windows then look in device manager. Windows should download the Generic driver for it.
Another option :
try going in the BIOS and change the "Primary Video Adapter" to "PCI-E x16" or PCI-E (x16 preferred)