Windows allows you to selectively specify the system shell based on the logged in user. For example this allows one user to use the standard explorer interface and another to use the legacy progman shell.
Open your registry and find or create the key below.
Create a new String value, or modify the existing value, called “Shell” and set it according to the value data below.
Exit your registry; you may need to restart or log out of Windows for the change to take effect.
REGISTRY SETTINGS:
User Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\
System]
System Key: [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\
System]
Value Name: Shell
Data Type: REG_SZ (String Value)
Value Data: Filename of Replacement Shell
ONLY FOR WINDOWS 2000/XP
