See the attached screen-shot of my What Is This issue. I use WIN 8.1 and IE11 and have seen this interrupt my browsing a few times now. Of course, I do not call the telephone number or click on any hypertext, but it does freeze IE11 so that I have to use Task Manager to quit internet explorer. I've run full scans with my Norton and it doesn't find anything. Not surprising. Any explanation or help would be appreciated.