October 14, 2025—KB5066835 (OS Builds 26200.6899 and 26100.6899)

October 14, 2025—KB5066835 OS Builds 26200.6899 and 26100.6899 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business...