Prevent viewing of drives through Internet Explorer
I’ve already covered how to hide local drives from My Computer (and common dialog boxes). But, you might want to also crack down on users circumventing this by typing the drive letter into an Internet Explorer window to get access to them.
Navigate to the key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
Create a DWORD value and name it NoFileURL. Set it to 1 (which means that drives can not be viewed with IE)
You might also consider hiding the Run menu option too (which I’ll have another dig around for!)

