Lock screen may refer to either of the following:
1. In general, a lock screen is an interface on a computer, smartphone, or tablet that appears upon startup. Access to all of the device's applications are limited when it is locked, preventing unwanted users from accessing the device's contents and settings. When a password is entered, or the device is unlocked with biometrics, the home screen, desktop, or app launcher is displayed and usable.
Most lock screens feature a customizable wallpaper with a different image than that displayed on a home screen or desktop. The lock screen on mobile devices also displays the current date and time, with any text messages, missed calls, or other notifications. Notifications can also be selected to launch an individual application once the device is unlocked. Most smartphone lock screens also allow users to access the camera and make emergency phone calls while the device is locked.
2. With Windows, the lock screen is a new feature introduced with Windows 8 and also available in Windows 8.1, Windows 10, and Windows 11. It displays an image, time and date, and can show preferred apps, such as your calendar, messages, and mail, all while your computer is locked. The picture below is an example of the Windows 10 lock screen.
To lock the computer and show the lock screen, press the Windows key+L.