Windows 7 is a major release of the Windows NT operating system developed by Microsoft. It was released to manufacturing on July 22, 2009, and became generally available on October 22, 2009.[9] It is the successor to Windows Vista, released nearly three years earlier. It remained an operating system for use on personal computers, including home and business desktops, laptops, tablet PCs and media center PCs, and itself was replaced in November 2012 by Windows 8, the name spanning more than three years of the product.

Windows 10 is a series of personal computer operating systems produced by Microsoft as part of its Windows NT family of operating systems. Devices in enterprise environments can receive these updates at a slower pace, or use long-term support milestones that only receive critical updates, such as security patches, over their ten-year lifespan of extended support.

Windows 10 is a series of personal computer operating systems produced by Microsoft as part of its Windows NT family of operating systems. Devices in enterprise environments can receive these updates at a slower pace, or use long-term support milestones that only receive critical updates, such as security patches, over their ten-year lifespan of extended support.

Windows 10 is a series of personal computer operating systems produced by Microsoft as part of its Windows NT family of operating systems. Devices in enterprise environments can receive these updates at a slower pace, or use long-term support milestones that only receive critical updates, such as security patches, over their ten-year lifespan of extended support.

Windows 10 is a series of personal computer operating systems produced by Microsoft as part of its Windows NT family of operating systems. Devices in enterprise environments can receive these updates at a slower pace, or use long-term support milestones that only receive critical updates, such as security patches, over their ten-year lifespan of extended support.

Windows 10 is a series of personal computer operating systems produced by Microsoft as part of its Windows NT family of operating systems. Devices in enterprise environments can receive these updates at a slower pace, or use long-term support milestones that only receive critical updates, such as security patches, over their ten-year lifespan of extended support.

Windows 10 is a series of personal computer operating systems produced by Microsoft as part of its Windows NT family of operating systems. Devices in enterprise environments can receive these updates at a slower pace, or use long-term support milestones that only receive critical updates, such as security patches, over their ten-year lifespan of extended support.

Windows 10 is a series of personal computer operating systems produced by Microsoft as part of its Windows NT family of operating systems. Devices in enterprise environments can receive these updates at a slower pace, or use long-term support milestones that only receive critical updates, such as security patches, over their ten-year lifespan of extended support.

Windows 11 is a series of personal computer operating systems produced by Microsoft as part of its Windows NT family of operating systems. It is the successor to Windows 10, and was released to manufacturing on July 15, 2015, and to retail on July 29, 2015.

Windows 8.1 is a release of the Windows NT operating system developed by Microsoft. It was released to manufacturing on August 27, 2013, and broadly released for retail sale on October 17, 2013, about a year after the retail release of its predecessor. It was Microsoft's operating system for use on personal computers, including home and business desktops, laptops, tablet PCs and media center PCs until it was succeeded by Windows 10 on July 29, 2015. Windows 8.1 was made available for download via MSDN and Technet and available as a free upgrade for retail copies of Windows 8 and Windows RT users via the Windows Store. A server counterpart was released on October 18, 2013, entitled Windows Server 2012 R2. Microsoft ended mainstream support for Windows 8.1 on January 9, 2018, and extended support will end on January 10, 2023.