The book "Windows Installer Technology. Part I. Capability Overview" is a stand-alone guide for software developers working in the Windows environment. The author examines the Windows Installer technology in detail, expands the reader's knowledge about the main capabilities of this program installation system. The book provides an up-front overview of how Windows Installer works, details the structure of program packages, and the process of deploying them. In the first part of the book, the reader will find clear explanations of the basic principles of the Windows Installer, instructions for creating your own installation packages, as well as information on the distribution and management of software applications in the Windows system. In particular, the authors pay attention to the important aspects of creating stable and reliable installers, which is critical for the successful operation of the software. This book is an excellent reference for developers who want to gain a deeper understanding of the Windows Installer system and improve their skills in this area. It will help the reader step by step to learn the basic principles of creating installation packages and to optimize work with software under the control of the Windows operating system.