I know it's an old thread, but thought I'd keep the options together. I had a problem today where I couldn't get my Windows 10 to see a Voyage, Kindle Keyboard, Kindle Fire and a Nook Glo. No idea what happened since all of these worked a week ago. Device Manager would not find them (but WOULD find a Nook HD+).
Solution: I reset each device (not factory reset) and then no problems. The Voyage has a reset in the menu. The other devices required holding the power button down for 20 seconds and then restarting after a few seconds. After the reset, I replugged them into the computer and computer saw them like nothing happened.
Hope this helps someone.