Click on the link below that matches your desktop size (most computers are 800x600 or 1024x768). The wallpaper will appear in your browser.
You will need to save the image to your hard drive (click and hold the mouse button on the picture and choose "save picture as..." from the menu that appears.) Control-click anywhere on the desktop (not an icon) to bring up the sub-menu, select change desktop background, select the picture tab.
Click select picture select the image you saved and then click set desktop.
PC
Click on the link below that matches your desktop size (most computers are 800x600 or 1024x768).
The wallpaper will appear in your browser, then right-click the image and select "SET AS WALLPAPER."