Drive in Publisher appears as "unknown device" in device manager. Unable to initialize job manager (invalid drive).
1. Uninstall the Unknown Device from Device Manager. (Right Click - Uninstall)
2. Go to C:\Windows\inf and delete the file INFCACHE.1
3. Unplug power and USB from the Publisher and reboot the computer.
4. When the computer is rebooted plug back in the USB and power.