Decide which picture you want to have on your PC desktop.
Once you have decided which picture you want, click on either the 800 x 600
or 1024 x 768 screen resolution, depending on your PC. You can do this by
right-clicking on your desktop, choose Properties then Settings and you
computer will display what your screen resolution is.
Once the file has downloaded, unzip the file by using WinZip or a similar
decompression program.
Simply right-click on the image and select "set as wallpaper" or "set a
desktop background".