Book excerpt: Learn about how to use Microsoft Windows XP and Vista operating systems with Reg's Practical Guide to Understanding Computers. This book will cover the following topics that applies to Windows XP and Vista: 1. Learning computer terminology 2. Learning about how to use the Desktop, search for things on your computer and changing your screensaver 3. How to get on to and use the Internet and using E-Mail to contact friends and family 4. How to properly backup and restore your computer in case of a system crash so that you don't lose the information you have stored on your computer 5. How to properly maintain your computer to prevent viruses, malware, Identity theft or any other issues with your computer 6. Creating separate users on your computer