Different port and different USB cable as well? I think someone else here went and removed it from the device manager while it was connected and then rebooted so it would get reinstalled.
Do you have another computer to try it on or a friend's computer. That way you will know if it is the E17 or your box.
Tried all ports and a different USB cable with no luck. I could try it on my laptop but I have a lot of important work to do on my main computer. Don't think I can.