How to See the Hidden Devices in Vista Device Manager
Just like your files and folders, Vista has hidden devices in the Device Manager to. This will show you how to see them. They are Non-Plug and Play Drivers and Storage Volumes.
Your listed hidden devices will vary.
Open the Control Panel. (Classic View)
Click on the Click to Play
button in the video below.
NOTE: See the post by Stickywulf under this one for more hidden devices in the Device Manager