Windows 10 and Windows 11 rely on three security certificates that begin expiring from June 2026, with additional expirations later in 2026. Microsoft is treating this as a broad, ecosystem-level ...

Microsoft confirms systems without updated Secure Boot certificates will boot normally but lose some security protections.

Microsoft has released the Windows 10 KB5078885 extended security update to fix the March 2026 Patch Tuesday vulnerabilities, ...

In June 2025, Microsoft announced that, in June 2026, it would begin deprecating Secure Boot certificates of Windows systems from 2011, which were superseded by their 2023 counterparts.

Make sure you've updated before the deadline.

Microsoft has recently begun replacing expiring Secure Boot certificates on eligible Windows 11 systems running 24H2 and 25H2 ...

Microsoft will use standard Windows 11 updates to keep Secure Boot working on existing PCs as the operating system's original certificates near their end. The company says Secure Boot certificates ...

Microsoft has released a “Playbook” for handling the Secure Boot certificates of Windows Servers, which expire in June 2026. It is intended to help IT administrators in organizations replace the ...

Microsoft urges Windows Server admins to prepare for Secure Boot certificate updates. Expiring 2011 Secure Boot certificates in June 2026 require proactive remediation. Updated firmware trust chains ...

In the early hours of Wednesday this week, Microsoft released the preview update for Windows 11. It is quite extensive in February. Among other things, the update brings new Secure Boot certificates ...