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Windows is a widely used operating system developed by Microsoft. An operating system (OS) is the main software that controls and manages the hardware and software resources of a computer. It provides a user interface and enables users to interact with the system. The OS handles tasks such as file management, memory management, process control, device management, and running applications.

Windows is responsible for loading programs like Microsoft Word or Google Chrome, allocating memory to them, and managing communication between the software and the hardware. It supports multitasking, networking, and system security. Versions of Windows include Windows 7, Windows 10, and Windows 11.