Přímo od pramene:
http://vip.asus.com/forum/view.aspx?board_id=1&mod el=P5LD2+SE&id=20100821225641343&page=1&SLanguage= en-usuninstall the usb driver using device manager, and then reboot your computer.
It should load a new driver.
If that still doesn't work try the Windows 7 Update service available on the internet.