A screen saver or screensaver is a software program that becomes activated after the computer is inactive for a specified amount of time. Screensavers were originally designed to help prevent images or text from being burned into older monitors.
In Windows, press the Windows key + L to lock the computer if you're stepping away from the computer. Locking the computer allow the screensaver to run, but prevents someone from accessing your computer in-between the time you step away and it takes to start the screen saver.
Are screen savers still needed?
The monitors and flat panel displays used today no longer suffer from burn-in issues found with older CRT monitors. However, screen savers are still used for their aesthetic value and to password protect a computer when the user is away from the keyboard.
Do screen savers save power?
No. When a screen saver is visible, it means your computer and monitor are both still on. So, you're using the same amount of power as if the computer wasn't showing a screen saver.
You'll save power and extend the life of your monitor if you turn it off when you step away from your computer instead of using a screen saver. If you want a screen saver to show your pictures or for other aesthetic reasons, you can also change your power savings mode to turn off your monitor after being away for an hour or more.
Confusion between screen saver and wallpaper
What are examples of screen saver programs?
In the past, screen saver programs like After Dark would install on your computer and run by itself. Today, most screen savers and screen saver packages install into the operating system which runs the screen saver.
Should I be using "screen saver" or "screensaver" in my writing?
Both "screen saver" and "screensaver" are correct and what version you use is often dependent on the style guide you use. Computer Hope follows the Microsoft style of writing screen saver as two separate words. According to Google Trends, more people have used "screensaver" than "screen saver" in their writing.