I connected to my laptop and it didn't show up there either.
It shows up in Device Manager as "WD". I tried disabling and then enabling. Still nothing.
I tried Control Panel> Administrative Tools> Computer Management> Disk Management and it does not show up there at all.
I tried installing Tweak UI. Clicked on My Computer> Drives and all letters were checked.
When I plug the drive in, I do hear it spin very quietly for a little while. No clicks.
The letter assigned to this drive was M, by the way.
i tried a different USB cable, same result.
That's about all the info I have.
I'm running Windows XP.