Download the Bing Screensaver
So as well as all the wonderful bing Windows 7 Themes (Bings Best 1, 2, 3 and Japan) there is also the Bing screensaver which has 20 Wonderful images that are shown when your computer has been locked or is not in use.
Bing Screensaver - Discover Bing
Learn more about changing your screensaver
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