Microsoft Root Certificate Authority | 2011.cer __link__ Download
Microsoft hosts a public PKI (Public Key Infrastructure) repository. This is the safest and fastest method.
Microsoft operates several Root Certificate Authorities, each serving different purposes and supporting a wide range of Microsoft products and services. These include but are not limited to, the Microsoft Root Certificate Authority 2011, which was introduced to support newer Microsoft products and services. Microsoft Root Certificate Authority 2011.cer Download
If you encounter 'Digital Signature Not Valid' errors, refer to the Microsoft Support Microsoft hosts a public PKI (Public Key Infrastructure)