The document provides instructions for installing Windows XP on a computer. It lists reasons for needing to install Windows XP, such as replacing a hard drive or reinstalling to remove unwanted programs. It outlines the pre-installation checklist including having the Windows XP CD and product key. The installation process is divided into three parts: starting the installation by booting from the CD, continuing the installation by personalizing settings, and completing the installation which takes 20-30 minutes to configure the computer.