October 14, 2025—KB5066780 (OS Build 25398.1913)

October 14, 2025—KB5066780 OS Build 25398.1913 Applies To Windows Server, version 23H2 Windows Secure Boot certificate expiration Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and business devices to boo...