HOW TO]Hide partitions without using any software

                         

1. Go to Start->Run.
2. Type DISKPART and press Enter.
3. In the console type list volume to see all the drives available on your PC.
4. Now select the drive which you want to hide. Suppose you want to hide D see the volume number opposite to Ltr D.
5. In My PC it is volume 4 for drive D(might be different in your computer) .
6. Now to hide drive D type Select volume 4 .(Select the appropriate number according to your system)
7. Then type remove letter d , this will hide your drive.
8. Now to get your drive back type Select volume 4 and then type assign letter d .
9. See this image

This normally works for all drives but may not work for system drives(The drive in which your OS is loaded).