Refreshing new certificates represents one of the largest coordinated security maintenance efforts across the Windows ecosystem,' Microsoft explains.

In June 2025, Microsoft announced that, in June 2026, it would begin deprecating Secure Boot certificates of Windows systems ...

Microsoft is reminding users that the Secure Boot ecosystem will soon require a mandatory check-up. The Redmond-backed security protocol, part of the UEFI specification and primarily ...

Microsoft is preparing to roll out new Secure Boot certificates via Windows Update to keep old PCs protected from boot‑level ...

Secure Boot helps keep your computer safe by using trusted certificates in UEFI firmware. It checks bootloaders and prevents dangerous applications from running before Windows starts. Through Secure ...

Microsoft has started automatically replacing expiring Secure Boot certificates on eligible Windows 11 24H2 and 25H2 systems. Secure Boot is a security feature that blocks malicious software (like ...

Microsoft reminds everyone that the initial wave of Secure Boot certificates, dropped in 2011, are due to expire.

Secure Boot is a feature of your PC's UEFI that only allows approved operating systems to boot up. It's a security tool that prevents malware from taking over your PC at boot time. While it's not ...

After disabling Secure Boot and installing other software and hardware, it may be difficult to re-activate Secure Boot without restoring your PC to the factory state. Also, be careful when changing ...

If your Windows computer does not boot normally but instead displays a red warning box saying Secure Boot Violation, Invalid signature detected, Check Secure Boot ...