My 2 TB My Book Essential 1140 will not work with the USB 3 port on my new Windows 8.1 computer. When I plug it in to the USB 3 port the computer registers that something has been plugged in, but not a disk drive. Device Manager has a yellow exclamation point that says “unknown USB device”, and System information says “USB Mass Storage Device … This device cannot start”
When I plug the drive into the USB 2 port of the same computer, it works fine. Other USB peripherals work fine in the USB 3 port, so I don’t think there is anything wrong with it.