>Up until a few days ago, Microsft had a link which allowed us to update the root certificates:
>
>http://www.microsoft.com/en-us/download/details.aspx?id=3867
>
>I had a link on the main page to this:
>
>22/08 15:00 Extended Validation certificate installed
>We have applied the Extended Validation certificate on the site. If you use Internet Explorer and cannot see the green bar, you may update the Root Certificates and refresh the page.
>
>This allowed us to simply click on a link there and run it. That was fixing the bug of the green certificate not being able to be shown properly.
>
>Anyone would know where I can get the same support now?

It surprises me there was a link that could automatically do it. Automatic installation of certs in a trusted store is a massive security hole e.g. the Lenovo Superfish fiasco.

AFAIK users should always install such certs manually e.g. http://www.poweradmin.com/help/sslhints/ie.aspx .

Newer versions of IE may require running IE as an Administrator to allow certs installation.