Nope, just plugged the unit right in with no software installed whatsoever.
HOWEVER
I found the solution!
The thing the other 2 computers had in common was that I was plugging the unit into a USB hub.
The MD unit requires more power than that. While it's recognized, it won't actually "boot up," until you give it enough juice from the USB port.
By removing a device that was on the root hub and placing the MD unit there, it fired up just fine.
Add it to the FAQ! :grin: :smile:
Thanks for your help, folks! I'm sure I'll be needing more.