Older compressed ZIP files contain the images in the BMP format: Unpack the background image with WinZip (www.winzip.com) and store it in your Windows system folder (C:\Windows or C:\WinNT).
If you want to use a newer image in the JPG format on an older version of Windows such as NT, you must first convert it into the BMP format with an image editing program and then file it as described in the previous section.