The caching of code and data is a common technique used throughout the Windows Operating System in order to improve system and application performance. While System Performance is a difficult subject, this work represents a digestable look at performance by isolating the top fifteen or so ways that caching is used in the Windows 7 Operating System. A book that not only explains how performance, but gives the reader techniques to investigate on his or her own. Each of the caching techniques described and detailed, and experiments are provided that the reader may use to look further into the performance of their own systems. Even performance experts will learn something new from this book. Numerous free tools are used for these experiments, and the appendix provides an excellent guide to using these tools. This book represents the culmination of years of research and a series of presentations made by the Author in front of audiences around the world.