To show Hidden devices from Device Manager, here are the detail steps, hope can help you: [br]
1. Press Win Key + X to launch the Shortcut features from Start Menu, for Windows 7 User, you can press Win Key + R and type devmgmt.msc [br]
2. After that, hit on the tab View from the menu bar, check “Show Hidden Devices“. [br]
3. Then expand all hard drive device lists to find whether there is the device with the light gray icon. Select them and uninstall. [br]
4. Restart your computer and check if the problem has been fixed or not.