External USB 2.0 HD not seen in device manager

[yky]

I have a WD external USB 2.0 HD. Yesterday, there was a message on screen asking to update driver or something. I ignored it. Now, the HD is gone. It is not under device manager/disk drives. Everything under universal serial bus controllers works properly.

I downloaded HDD Scan and ran it. It did not find the drive. What can I do now?

 

[WinXPert]

Try this:

1. Uninstall your USB Mass Storage Device then Scan for Hardware Changes.
2. Clear your Mountpoint. You can use Autorun Protector (req .NET2.0) or delete all Mountpoints2 entries in regedit
3. Use DriveCleanup (posted by LookinAround)