But it closes so fast I can't read it..... but it is square, grey, and has some red writing in the box. I can read the word "close", and not much else. It comes up for less than a second, I bet, and then my webpage that I want opens up. Pops up an awful lot, but not for every web page. I know it does it when I go to Yahoo's main page - most of the time. I "think" I see the word "malware", but it goes so fast I can't be sure.
Edit.... I just stared at the box when it opened again.... it says "This Site Contains a Known Virus".
OK, so I do not visit porn sites, and generally only well known sites that I have used for years.... "Occasionally" I may clock a link from Google news that I am unfamiliar with, but that is about it.