Most users never interact with this file because Windows manages it automatically through the Microsoft Root Certificate Program . However, you might need to handle it manually if: Trusted Root Certification Authorities Certificate Store
To understand the "2011" variant, one must first grasp the concept of a Root Certificate Authority (CA). Think of a Root CA as the supreme court of digital identity.
openssl x509 -in microsoft-root-2011.cer -text -noout