this looks fishy to the extreme.
edit
hm, looks harmless after all, but also pointles
the link given is to install the update for IE 4.0, which is not supported by MS no more.
https://www.verisign.com/support/advisories/page_029264.htmlspecifically:
Who is affected by this change?
This change affects only existing and new customers who are using VeriSign Secure Site or Commerce Site SSL certificates on supported Microsoft IIS web servers.
If you are using web servers other than Microsoft IIS (“non-IIS”), please note that we are not making any changes to your certificates at this time.
and:
What action do you need to take?
If you are using Microsoft IIS 5.0 or 6.0: Since Microsoft IIS 5.0 and 6.0 automatically import and install any new intermediate CA certificate that’s presented, this change is completely transparent to you. No action is required.