hi all i started my pc 2day 2 find thay some of my usb devices hav stopped workin and an error msg in device manager. the error is on the standard enhanced PCI to USB HOst controller. could someone plz giv me a link to a driver plz. my mobo is a asus m4n68t m le v2 Windows 7 x64

any help is very much apreciated. thanks
EDIT: I uninstalled the driver n rebooted. windows reinstalled the driver n all seems ok so far