How to change "Ctrl+Alt+Delete" options using Registry ?

1. Run dialog : regedit.
2. Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System.
3. In this key, create DWORD named DisableLockWorkstation and valued 1 in hexadecimal for Lock this computer.
4. Create DWORD named HideFastUserSwitching and valued 1 in hexadecimal for Switch User.
5. Create DWORD named NoLogoff and valued 1 in hexadecimal for Log Off.
6. Create DWORD named DisableChangePassword and valued 1 in hexadecimal for Change a password.
7. Create DWORD named DisableTaskMgr and valued 1 in hexadecimal for Task Manager.
8. Restart the computer.