Description of problem: A new service, usbclerk, that knows how to install/uninstall Windows usb drivers (specifically the WinUSB driver). Spice client (mingw-virt-viewer) send requests to install/uninstall the driver for USB devices when users connecting/disconnecting a USB device to a guest (aka usbredir)
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHEA-2012-1527.html