Блокируйте экран, когда отходите.

Блокировка экрана не даст посторонним людям воспользоваться компьютером в ваше отсутствие. Все приложения с вашей работой останутся открытыми, но экран будет заблокирован, и на нем будет действовать хранитель экрана.

You can lock your screen in one of the following ways:

[Замечание]

You can add a Lock Screen button to a panel for easy access. Right-click a panel (for example, the panel at the top of the screen), select Add to Panel... and drag the Lock Screen item to the desired location.

To unlock the screen, move the mouse or press a key. Then, type your password and either press the Return key or press the Unlock button.

If more than one person has a user account on your computer and the screen is locked, other users can press the Switch user... button to use the computer, even while the screen is locked. They will be unable to access your currently-open work, and you will be able to switch back to your locked session when they have finished using the computer.