How to Hide a Local Drive using command prompt.

Open Command Prompt
Type DISKPART and hit Enter
Type list volume and hit Enter
Command Prompt displays all the partitions of the Hard Drive
Then type the Drive Letter that you want to hide. If you want to hide volume D, type select volume D and hit Enter.
Type remove letter D and hit Enter.
Now restart your computer. When you start your PC again, you wont be able to see the particular drive in My Computer.
How to get back Hidden Drive again
Open Command Prompt
Type DISKPART and hit Enter
Type list volume and hit Enter
If you want to unhide volume D, type select volume D and hit Enter.
After that type assign letter D and hit Enter.
Restart your PC, now you will be able to see hidden local drive in My Computer.
Note:Don’t be afraid, no data will be lost from your computer. So feel free to try this trick.