When you install Windows, you don't need to worry about motherboard or other drivers to start. Windows simply installs itself and then you install DVD which came with the motherboard, or you can download an up-to-date version from the web site.
So the problem is why did your installation not work. Was there already a Windows 7 installation on the PC? If so, did you instruct your installation to reformat the HHD first? If yes to the first question and no to the second, you may be trying to repair an existing installation and this is causing problems. I suggest you make sure that the drive you are using has nothing on it and shows at least 30Gb available.