How to Remove Logoff or Sign out Option from Registry ?

1. Run dialog : regedit.
2. Go to HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer.
3. Create new key named Explorer if doesn’t exist.
4. In this key, create DWORD named StartMenuLogoff and valued 1 in hexadecimal.
5. Restart the computer.