My external WD hard drive will turn the lights on when you first plug it into my computer but the lights will turn off quickly and it wont spin up. When I plug the same hard drive into another computer it is recognized and works perfectly. I am confused how a hard drive can work on one computer, but not even show up in the device manager or disk manager on another computer. I have tested and the USB port and cable are fine on both computers. Any help would be appreciated.