Randomly opens up tab saying "Your ip is criminal"

[AC Question]

When I'm doing random tasks like checking Facebook or browsing online websites a random pop up comes up saying "Your phone is damaged from visiting adult sites! Click here to download DU Speed Booster!" I check the box saying "Do not show this again" but it always manages to pop back up at random times. One popped up earlier saying that my ip is criminal, and immediately took me to DU Speed Booster. What is going on?

 

[belodion]

This:
http://forums.androidcentral.com/showthread.php?t=699386

Try Safe Mode, to test whether it comes from a third-party app.