Windows 10 KB5078885 ESU out with Secure Boot 2023, replacing expiring Secure Boot certificates from 2011. But it's a staged roll out.
How to check your Windows PC for expiring security certificates - a big one is ending soon ...
Don't let your PC languish ...
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that, in June 2026, it would begin deprecating Secure Boot certificates of Windows systems from 2011, which were superseded by their 2023 counterparts.
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 ...
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