Of the more than 200 million computers in use today, nearly 75 percent are obsolete according to today"s fast Pentium standards. If your machine is more than a year old, you need this book. The clear, step-by-step explanations in this book allow even complete computer novices to make all of the important software and hardware upgrades necessary to keep their computers running trouble-free. Tutorials, photos, and illustrations show you how to install memory, hard drives, CD players, and scores of other peripherals. A glossary of terminology rounds out this essential book for beginning and intermediate computer users.