Vista - "USB Device Not Recognized"

I got a Kodak digital camera a few months ago and haven't had any
problems with it until today. Now, all of a sudden, the "USB Device
Not Recognized" when I plug it in.

I've tried different USB ports, rebooted, checked Kodak's website,
checked newsgroups and Google. It's still not working.

When I try to "update driver" I'm told that the software and the
driver for this device are already installed. How does it know that
if the device is "unknown?"

I don't understand why it's worked fine until today -- I haven't
changed anything.