Have you tried uninstalling them and let windows "find" them again and see if it works?
Try reinstalling the motherboard drivers, which also should do the Nic also.
Tried uninstalling them and was told that there was a problem loading the drivers because of error code 31, tried updating thembut was told that the ones on my P6TD Deluxe installation DVD were older than the ones I already had installed. When I select delete the files still remain in device manager with yellow flags. The only thing that solved this was doing a repair install of Windows 7, but there are still the yellow flagged instances in device manager....