At this point, I would suggest that you back up ALL your inportant files (including anything in Downloads) and do a complete refresh.

I had a similar problem when I downloaded a file from Cnet/downloads. I wasn't paying attention and downloaded a tool bar. I removed the tool bar but kept getting a pop-up. At any rate my Poser and DAZ was trashed and could only fix it with a total refresh. For what it's worth I have a Dell XPS 15 with the Quad display. (1920x1080)

A word to the wise, be very vigilate when getting files from Cnet.