Microsoft has confirmed that Secure Boot certificate updates are failing or being blocked on some Windows 11 PCs.

A crucial Windows security certificate just expired - how to check your PC ...

The Secure Boot Certificates will expire in June 2026. That’s why it is mandatory to get the latest Secure Boot Certificates update. Ignoring this update may lead to severe consequences, as it will ...

HP, Dell, ASUS, Lenovo, MSI and Acer have published Secure Boot certificate guides. Here's what each PC manufacturer says you ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. Check your PC by the end of this month. This has never happened before. Microsoft is ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. All change for Windows. Updated on Apr. 18 with another Windows update starting this month.

PCWorld reports that Windows 11 PCs may restart multiple times after recent updates due to Secure Boot certificate refreshes being rolled out by Microsoft. These multiple reboots are normal behavior ...

Microsoft extended consumer Windows 10 security updates to 2027, with a no-cost option for eligible PCs and separate rules ...

Certificate Expiration: The KEK CA 2011 certificate expired on June 24, 2026, stopping unpatched systems from receiving new Secure Boot revocations. Trust Chain Preservation: The update replaces 2011 ...