EarthView is a fairly cool dynamic desktop background/wallpaper + screensaver program that only takes earth as its theme, developed by DeskSoft from Austria. It gives us a direct bird's-eye view of the earth from outer space on desktop, and shows the shift of day and night (i.e. the daylight zone and dark area at night) and the atmospheric cloud changes in a dynamic way, which can give users a stunning visual experience.

In addition to a lot of junk files, useless system components and services that will make your Windows run slower and slower, another possible reason is all kinds of malicious software are haunting in the background. In this case, you might as well try to use SUPERAntiSpyware to scan, check and remove them.