An operating system (OS) is a computer program (set of computer instructions) that coordinates all the activities of computer hardware such as memory, storage devices, and printers, and provides the capability for you to communicate with the computer. (Cengage, 2017)

Windows 10 is a major release of the Windows NT operating system developed by Microsoft. It is the successor to Windows 8.1, which was released nearly two years earlier, and itself was released to manufacturing on July 15, 2015, and broadly released for the general public on July 29, 2015. (Wikipedia)