Screensavers are computer programs that replace the image on your screen when the computer is not used for a period of time. While they were originally designed to spare the image quality of a computer screen, screensavers are nowadays more commonly used for decorative purposes. There are many variations of free screensavers available for download online. Some play a video sequence, others display a particular line of text, require a password when returning to the desktop, have sound effects or music, or display slideshows of photos. Some even perform a useful task in the background, like a virus-scan. All the screensavers you can download here are for computers running Microsoft Windows.