I found this book to be a great help in repairing older PC's at work. I switched to Windows 7 a couple of years ago, and needed a refresher on the company's older XP machines.This book helped a lot, lots of great info and tips on the older Microsoft O.S.Not to mention I got a used copy, sure saved a ton that way as well!HIghly recommended to get info on older PC's running XP!