Right click on desktop and click properties, click the "desktop" tab, in the background there are pictures you can choose, or you can add pictures by clicking command button browse.
click on the start menu.
go to the control panel.
click on apperence and themes.
go to change the desktop background.
then choose which you wish to look at!
there are many you can choose from or you can use a picture that you already have saved on your computer.