When a computer is locked, programs continue running, but a password is required to use the computer again.

The **Lock** option protects access to the computer without logging the user out. Programs remain running, while the user must enter a password to resume access. This differs from **Log off**, which closes programs and ends the user's session. The distinction matters when a user wants to step away while leaving work active. **Key takeaway:** Locking preserves the active session; logging off closes programs and ends it.\n\n**Glossary:**\n- **Lock**: A power or session option that blocks access while leaving programs running.\n- **Log off**: An option that closes programs and ends the current user session.