Go to a wallpapers website for eg.. Angelina Jolie Wallpapers (Wallpaper 1-15 of 90) Click on a wallpaper you want..and it will become big. Some websites allows you to choose the size from.. Likd 800x600 or 1024x768 or may be bigger.... You select which suits you. To set as desktop background > RightClick on the wallpaper and set as desktop background. To Save > Right Click on the Wallpaper > Save as.
