"Copy to File..." button is disabled in certificate dialog

In the certificate details dialog, the button to save it is disabled. Why is that? I remember it working before.

What I did was:

• open a new window of IE (best to close all others first)
• to visit a HTTPS website, like https://www.google.com
• click on the Certificate button (next to the URL bar)
• then click "View certificates"
• see picture below

It is the same on Windows 7 and Windows 8.1 , both using IE11.

Example:

Addendum:

I tried Chrome on the same PC and there the button is available. See screenshot, the left dialog is opened by clicking the padlock icon in Chrome and the right one by doing the same in IE:

PS: I'll use Firefox until then... (or Chrome)

You need to run as Admin – DavidPostill

@DavidPostill's comments resolve same issue for me. After I run IE as admin, I can copy the website certificate to a file.