Hi,
Disconnect any USB devices including USB Mouse & Keyboard, use PS/2 mouse
and keyboard at this time.
Go to Device Manager, right click the Universal Serial Bus Controller.
Right click on the XXX PCI to USB Host Controller and select uninstall.
If you see XXX PCI to USB Enhanced Host Controller (USB 2.0), uninstall it
also.
Reboot the PC to normal. Windows should found new hardware and install the
proper drivers.
Peter