The file was a ghost. A digital skeleton key.
CN=Microsoft Root Certificate Authority 2011, O=Microsoft Corporation, L=Redmond, ST=Washington, C=US . microsoft root certificate authority 2011.cer
You can download microsoft root certificate authority 2011.cer from a trusted source (like Microsoft’s own download center for root certificates). Then: The file was a ghost
The Microsoft Root Certificate Authority 2011 certificate, also known as microsoft root certificate authority 2011.cer , is a root certificate authority (CA) certificate issued by Microsoft. This certificate is used to verify the identity of Microsoft's root certificate authority, which is responsible for issuing certificates to Microsoft products and services. microsoft root certificate authority 2011.cer