You can decorate your desktop with a pick-me-up wallpaper, or give your Windows 7 system a complete sci-fi makeover. Better yet, you can donate your PC’s idle time to make the world a better place.

Are you tired of booting your PC each and every workday to the same boring background image? If so, change it up! Use Microsoft’s Bing Wallpaper app to refresh your PC’s desktop wallpaper with ...