Microsoft Root Certificate Authority 2011.cer ((link)) -

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, was built on aging standards and was set to expire. If a root certificate expires, every piece of software, update, or driver signed by it suddenly becomes "untrusted." microsoft root certificate authority 2011.cer

In modern UEFI-based systems, this certificate is often embedded in the firmware's "Authorized Signature Database" (db). This allows the hardware to verify the bootloader’s integrity before the operating system even starts, protecting against rootkits. Distribution and Lifecycle Navigate to