Microsoft Windows Control Panel: When you want to change the background on your computer, you first go to the button then and then go settings and you will see something called Control Panel. Then click on the icon that says Display
Microsoft Windows ScreenSaver: The window you will see will look like this.
ScreenSaver Choices: Now click on the tab that says Screen Saver.
Choose your ScreenSaver: To select a screen saver click on the arrow. You can now choose what theme you would like for your computer. Remember to choose Apply before you close the Display Properties.