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.
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 ...
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 ...
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Still on Windows 10? Microsoft will retire security feature that protects your PC from malware
If you're still using Windows 10, another critical defence in its security protections will expire soon. Microsoft is retiring Security Boot — a feature focused on blocking "untrusted code" so your ...
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