Microsoft Windows 7
2009, October 22
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. It is the successor to Windows Vista, released nearly three years earlier. Windows 7's server counterpart, Windows Server 2008 R2, was released at the same time. It sold over 630 million copies before it was succeeded by Windows 8 in October 2012.
Extended support ended on January 14, 2020, over 10 years after the release of Windows 7; the operating system ceased receiving further updates after that date. A paid support program was available for enterprises, providing security updates for Windows 7 for up to three years since the official end of life.
Windows 7 was intended to be an incremental upgrade to Windows Vista, addressing the previous OS's poor reception while maintaining hardware and software compatibility as well as fixing some of Vista's inconsistencies (such as Vista's aggressive User Account Control). Windows 7 continued improvements on the Windows Aero user interface with the addition of a redesigned taskbar that allows pinned applications, and new window management features. Other new features were added to the operating system, including libraries, the new file-sharing system HomeGroup, and support for multitouch input. A new "Action Center" was also added to provide an overview of system security and maintenance information, and tweaks were made to the User Account Control system to make it less intrusive. Windows 7 also shipped with updated versions of several stock applications, including Internet Explorer 8, Windows Media Player, and Windows Media Center.
Unlike Windows Vista, Windows 7 received warm reception among reviewers and consumers with critics considering the operating system to be a major improvement over its predecessor because of its improved performance, its more intuitive interface, fewer User Account Control popups, and other improvements made across the platform. Windows 7 was a major success for Microsoft; even before its official release, pre-order sales for the operating system on the online retailer Amazon.com had surpassed previous records. In just six months, over 100 million copies were sold worldwide until July 2012. By January 2018, Windows 10 surpassed Windows 7 as the most popular version of Windows worldwide. Windows 11 overtook Windows 7 as the second most popular Windows version on all continents in August 2022.
As of December 2025, it is estimated that 3.92% of computers are still running Windows 7.
It is the final version of Microsoft Windows that supports processors without SSE2 or NX (although an update released in 2018, more specifically KB4103718 dropped support for non-SSE2 processors).
