A French-language technical guide to Microsoft Windows for 286 and 386-based personal computers, this book presents the operating environment as it was used on late-1980s PC systems. It focuses on practical operation for users learning to work with Windows, covering the interface, file management, launching and organizing programs, system settings, and everyday computing tasks. The title indicates a clear emphasis on machines powered by Intel 80286 and 80386 processors, making it relevant to readers seeking guidance on running Windows in that hardware context. Written for practical use rather than software development, the work serves as a structured introduction to graphical computing and routine Windows workflows during the early period of the operating system.