Make Hard Drive Inaccessible

Just use the following trick to make the c drive inaccessible when you click on the drive.

Procedure:
Go to the registry editor and navigate to the following place:
HKEY_CURRENT_USER\Software\Microsoft\Win\CurrentVersion\Policies\Explorer
In the right hand pane for the Explorer key, create a new "DWORD" value named ViewNoDrive
Double click the new value and enter it as .......
for hiding A drive set value as 1 , for B its 2 and C its 4 and so on and for Z its 33554432
Generally multiply it by 2 for the next alphabet to hide

Once done, reboot or log off and login in again.
Then try double clicking the drive you made inaccessible.

You should receive a message stating that the drive cannot be accessed.