Knowing what is in the operating system "under the hood", system administrators will be able to quickly understand the behavior of the system and solve problems of increasing productivity and diagnostics of failures. Security professionals will need information on how to deal with operating system vulnerabilities. The seventh edition was completely redesigned for Windows 10/11 and Windows Server (2022, 2019 and 2016). In addition, HyperV information was added to the book, chapters on the boot process, new data storage technologies and Windows control mechanisms were completely revised. You will find unique information based on the source code of Microsoft, and practical experiments using the latest debugging tools aimed at demonstrating the behavior of internal Windows components. New user interface design elements that appeared in Windows 11 are based on familiar Windows 10 technologies, so readers will be able to immediately move to a new stage of computer technology development. For experienced programmers, architects, administrators and other professionals in quality, performance, security and software support. Knowledge of Windows at the level of an experienced user is required.