USB flash drive not present in My Computer or

Hello,

We've got a user who is having problems accessing the contents of his
USB flash drive. The funny thing is that, though Windows makes the
standard "new hardware found" sound and a dialog balloon from the
system tray states that new hardware has been detected, the drive does
not appear in My Computer or Disk Management in the MMC (no drive
letter, no disk without a drive letter). In Device Manager, however,
"Generic Volume" does appear.

Additionally, every time we attempt to remove the USB flash drive
through the standard "safely remove hardware" routine, we will tell it
to "stop" the device, it work, and the device
will be "stopped" and the massage appear" safe to remove your device" .

We have uninstalled all USB drivers as well as the "generic volume"
and performed a reboot, and that didn't do anything. We are still
unable to see the drive in either My Computer or Disk Management in
any form. Any ideas as to what might be the problem?

Thanks,
Dan