Provide the correct drivers for the hard disk controller
-If you are trying to perform a clean installation of Windows, you must provide the correct drivers for the hard disk controller.
-When you are prompted to select the disk on which to install Windows7, you must also click to select the Load Driver option. Windows Setup will guide you through the rest of the process
-May need to entirely reformat HDD and reinstall Win7 again if still doenst work and repeat the same step provied above..