September 8, 2026—KB5122878 (OS Builds 19045.7725 and 19044.7725)

September 8, 2026—KB5122878 OS Builds 19045.7725 and 19044.7725 Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows 10 IoT Enterprise LTSC 2021 Important Free support for Windows 10 Enterprise LTSC 2021 will end soon. For information about the availability of an Extended Security...