Microsoft will discontinue support for Windows 11 24H2 on October 4, 2026. Windows 11 23H2 Enterprise, Education, and IoT Enterprise support ends on November 10, 2026. Office 2021 support will conclude on October 13, 2026. Upgrading from Office 2021 to Office 2024 will require purchasing a new license. The following products will also lose support in 2026: .NET 9 (November 10), .NET 8 (November 10), PowerShell 7.4 (November 10), and Windows Server 2012/2012 R2 (October 13).