How To Hide Drives in Windows:
1.Go to run .
2.Type "diskpart".
3.Type "list volume"....
4.Now select the volume you want to hide by typing "select volume n"(n is the volume number against the drive you want to hide).
eg: select volume 2.
5.Type "revome letter x"(x is the drive name).eg: remove letter D.
Done, now check my computer .

If you want to show the drive again then repeat step 1 to 4 then type "assign letter x".
Note :
**Dont try with drive C **
** If you have locked something with Folderlock or other software then after assigning the drive everything will be unlocked ;)**

The manipulations cannot be done on the data present in the drive that is hidden. It has to be unhide to perform the normal operations.