is right, make sure you are up to date.
Have you tried HERE?
SO it did recognize the USB devices at one time? What changed? I assume this condition exists with all the USB slots and multiple USB devices, ( i.e. the same USB key drive not working in all USB slots may indicate a problem with the device not the USB slots, for example )
Under device manager / Universal serial bus controllers, what is the state of the installed controllers/hubs? Any yellow exclaimation marks?