Hide Drives Partitions C:,D:,E:

This is a great trick you can play on your friends. To disable the display
of local or networked drives when you click My Computer.
1.Go to start->run.Type regedit.Now go to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Policies\Explorer
Now in the right pane create a new DWORD item and name it NoDrives(itis case sensitive). Now modify it's value and set it to 3FFFFFF
(Hexadecimal) .Now restart your computer. So, now when you click on
My Computer, no drives will be shown(all gone...). To enable display of
drives in My Computer, simply delete this DWORD item that you created.
Again restart your computer.You can now see all the drives again.
Magic.