October 13, 2026—KB5126657 (OS Builds 19045.7807 and 19044.7807)

October 13, 2026—KB5126657 OS Builds 19045.7807 and 19044.7807 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 ends on January 12, 2027. To learn about continuing support, see Plan for Windows...

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...

September 14, 2026—KB5129236 (OS Builds 19045.7727 and 19044.7727) Out-of-band

September 14, 2026—KB5129236 OS Builds 19045.7727 and 19044.7727 Out-of-band Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Important Free support for Windows 10 Enterprise LTSC 2021 will end soon. For information about the availability of an Extended Security Update ESU, see the End o...