Have you tried resetting your browser settings? That's one way to remove unknown settings made by a Potentially Unwanted application to your browsers which have been redirecting you or opening these pop-ups.
Afterwards, clear your temp folder. To do that: Press Windows+R on your keyboard, type %temp%, then delete all files
If problem persists, please post the log collected by HiJackThis tool (Download here: https://sourceforge.net/projects/hjt/) so I can take a look.
Or you can contact Technical Support for speedy assistance:
Hi erza. I just went to download the link above for "sourceforge..." and when I hit "download" Trend Micro gave me a warning that this is a "dangerous page and has been known for malware etc."
Are you certain this is a safe download when my TM 2017 is saying it is not?