Turn your screen saver on or off
A screen saver is a moving picture or pattern that appears on your computer screen when you haven't used the mouse or keyboard for a specified period of time. Screen savers were originally used to save older, monochromatic monitors from damage, but now they are mainly a way to personalize your computer or enhance its security by offering password protection.
Open Screen Saver Settings by clicking the Start button , clicking Control Panel, clicking Appearance and Personalization, clicking Personalization, and then clicking Screen Saver.
To turn off all screen savers, under Screen Saver, click (None) in the drop-down list, and then click OK.
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To turn on a screen saver, click a screen saver in the drop-down list, and then click OK.