Microsoft Root Certificate Authority 2011.cer -

The root is still trusted but considered "legacy". Microsoft is slowly encouraging a shift to the 2017 roots.

If you have ever opened the Microsoft Management Console (MMC) to inspect your certificate store, or troubleshot an SSL error, you have likely seen this name. But what exactly is this file? Why does it matter? And what happens when it goes missing or becomes corrupt? microsoft root certificate authority 2011.cer

This root effectively superseded older anchors like the Microsoft Root Authority (from the late 1990s) and Microsoft Root Certificate Authority (from 2001). While those older roots have since been deprecated or removed from the Trusted Root Store, the 2011 version remains a cornerstone of Windows 8, Windows 10, and Windows 11. The root is still trusted but considered "legacy"