I don't like google chrome, but it is on this pc & gives the following info for turning on pop-up blocker:
Pop-ups, redirects, and other malware
If you're seeing pop-up ads that won't go away, ads from sources you don't recognize, or you suddenly have a homepage that you know you didn't set, you might have an unwanted ... If malware on your computer has changed your settings, follow the steps below to reset your settings and remove unwanted programs.
Search Help › Problems with Google Search › Spam
Hopefully this might help