Microsoft has announced that the original Secure Boot certificates that were issued when the feature first began shipping 2011 are set to expire this June, and that PCs which are not up to date will enter a degraded security state when this happens. This is the first time since Secure Boot was introduced that its certificates are expiring.
Secure Boot is a security feature that ships as part of Windows PCs, and is on by default. It protects your PC from certain security vulnerabilities that could be exploited during the boot phase, before Windows even fully loads, and ensures only signed code can run during this phase.
