It is Windows 10

IE11
V 11.483.15063.0

Which version of Internet Explorer do you use?
As they seem to say that an outdated version may be the cause of the problem. But from the screenshot it looks like Windows 10, so it is normally the latest available version (11)

I PM'd you that info

can you try to get the ad ID when/if you get it again?
http://imcdb.org/temp/How_to_Find_and_Report_Bad_Ads.pdf
they can't easily block a specific ad without that info

FIOS ad now causing same invalid certificate message from before. There was another video ad earlier today too (from best-tv.com)