How to remove ad.xtendmedia.com

Greetings,

 

My computer is infected with ridiculous pop-ups from ad.xtendmedia.  I've run various Norton scans but the problem isn't recognized.  A google search shows many people having this issue, yet a search of the Norton forums makes no mention of the issue.  The google search results, mostly from unrecognizable sites, list several steps and different tools needed to remove the problem.  

 

Does Norton have a solution to the xtendmedia problem?