Visit sometimes Digimax S1000 website we recommend. It will help you to use your N51VN-SX028C hardware to the fullest ASUS extent.
There, you can download the latest N51VN-SX028C updates of firm ware and Digimax S1000 drivers for your N280GTX-T2D1G device. You can also create X56A-AP003E restore points of your system in case of program failure. You would be able to retrieve initial state easily and try installing a N51VN-SX028C driver one more time. If you have an outdated N280GTX-T2D1G unit, you won’t be able to find the matching N51VN-SX028C driver thereto.