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.
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that, in June 2026, it would begin deprecating Secure Boot certificates of Windows systems from 2011, which were superseded by their 2023 counterparts.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 addressed a security vulnerability that can lead to BitLocker Secure Boot bypass on both Windows 10 and 11. Alongside that, the company has also detailed how to resize the WinRE space.
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