I had something similar pop up a few weeks after I got my S6 Edge. I can't recall what the pop ups were, but the kept coming up, despite my having said no to them...I believe they were supposedly updates to the phone. I finally got fed up with it and contacted both Sprint and Samsung. In the end, I had to wipe the phone clean and start over. I made sure not to install any further apps than the ones I already knew weren't issues. Problem has been solved, ever since. I believe it was some app I got from Google Play that must have actually be malware.