How to change the wallpaper or desktop background?

Right click on a empty space on the desktop and click on Personalize. (See screenshot below)
2. Click on the Desktop Background link at the bottom of the window. (See screenshot below)
NOTE: The name in gray under Desktop Background is the current desktop background file name.
3. Select a Picture LocationA) Click on the drop down arrow menu to select from the list of available picture folder locations, or click on the Browse button to navigate to the picture folder location. (See screenshot below step 7)
NOTE: To use another regional wallpaper, see the yellow TIP box at the top of the tutorial. To remove a folder from the Picture location, see How to Remove the Windows 7 Desktop Background Picture Location History.
B) Select the picture folder and click on Select Folder.
4. Select a Desktop BackgroundA) Right click on an available picture, or click (check) on the box in the upper left corner of the picture, to select it. (See screenshot below step 7)
NOTE: You can continue to right click on the images to see it previewed on your desktop until you decide which one you like best.
5. Select the Picture PositionA) Click on the drop down arrow menu, and click on the picture position you want for the desktop background. (See bottom of screenshot below step 7)
6. For a Desktop SlideShowA) For how, see: How to Create a Desktop Slideshow in Windows 7
7. Click on OK to apply the changes. (See screenshot below)
8. Close the Personalize window when done. (See screenshot below step 2)