Hide the Local drives in your Computer

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.

Go to start->run.
Type regedit.
Now go to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

Now in the right panel
create a new DWORD item and name it No Drives (it is case sensitive)
Now modify its 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.