Microsoft Root Certificate Authority 2011.cer |link| -

The .cer extension typically indicates one of two formats:

Error. Trust chain validation failure.

As the custodian of trust for millions of machines, the Microsoft Root Certificate Authority 2011 is a high-value target for attackers. However, Microsoft employs several protections: microsoft root certificate authority 2011.cer

It is the primary authority used to verify the authenticity of Windows Update packages. By validating the digital signature of an update against this root, the operating system ensures the code has not been tampered with by a third party. microsoft root certificate authority 2011.cer