October 14, 2025—KB5066791 (OS Builds 19044.6456 and 19045.6456)

October 14, 2025—KB5066791 OS Builds 19044.6456 and 19045.6456 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot secure...