- Click Start -> Run (This brings up the Run dialog box)
-Type cmd and press Enter (This brings up the Windows Command Prompt)
- Type diskpart in the command prompt and press Enter (This launches the Diskpart utility within the Command Prompt window)
- Now type list volume (This displays a list of all mounted volumes on your computer and their associated drive letters)
- Now type remove letter E (Note: This sometime requires a reboot)
Diskpart will now remove the drive letter. The drive will no longer be available via Windows Explorer or My Computer.
Don’t worry though, your data remains safe!Now, should you want to unhide the drive and make it accessible again, just repeat the above process.
But instead of typing remove letter E, type assign letter E