Compare Lock, Log off, Sleep, Restart, and Shut down in terms of what happens to the user session, programs, and computer.

These options differ in how they affect the active session and the computer's power state. **Lock** preserves the session and running programs but requires authentication to return. **Log off** closes programs and ends the session without turning off the computer. **Sleep** retains running programs in a low-power state. **Restart** closes programs and reloads Windows, whereas **Shut down** closes programs and turns the computer off. **Key takeaway:** The options are not interchangeable; select one according to whether work must remain active and whether the computer should stay on.\n\n**Glossary:**\n- **Session**: A user's current signed-in activity on the computer.\n- **Low-power state**: A state that uses less energy while retaining the active programs.\n- **Authentication**: Verification, such as entering a password, before access is granted.