If you disable this setting, screen savers do not run. Also, this setting disables the Screen Saver section of the Screen Saver tab in Display in Control Panel. As a result, users cannot change the screen saver options.

START > RUN > GPEDIT.MSC > USER CONFIGURATION > ADMINISTRATIVE TEMPLATES > CONTROL PANEL > DISPLAY > FIND SCREENSAVER > RIGHT CLICK PROPERTIES > CLICK DISABLE > OK