How to check your Windows PC for expiring security certificates - a big one is ending soon ...

Windows 10 KB5078885 ESU out with Secure Boot 2023, replacing expiring Secure Boot certificates from 2011. But it's a staged roll out.

Don't let your PC languish ...

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

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that, in June 2026, it would begin deprecating Secure Boot certificates of Windows systems from 2011, which were superseded by their 2023 counterparts.

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

TL;DR: Secure Boot certificates in Windows 10 and 11 will expire by June 2026, risking system security and compatibility. Microsoft is issuing new certificates through updates and OEM firmware ...

The big picture: Microsoft is officially ending mainstream support for Windows 10 today, which means millions of devices still running the older OS will no longer receive new features, security ...

Tech experts have issued a warning to millions of Brits as official support for Windows 10 will completely stop in October 2026 ...