Hi Carol,
I just bought the same drive. Neat package but same problem. Tried it on a XP laptop and got the same message. Called Western Digital and was informed that they do not support Vista X64 and, further, it probably didn't work on the lap top because the USB port did not supply adequate power. WD is sending me a cable that draws power from 2 USB ports. Answer not good enough for me. I share your frustration.
If you resolved your problem, please share with me either on this forum or email to
dickvw@ca.rr.com.
Thanks,
Dick