Untraceable pop up ads on galaxy tab s2.

[Android Central Question]

I have recently started getting pop up ads on my tab s2. They are whole screen and take over when i am watching a video, using an app or the internet. Once or twice they have appeared when i am doing nothing. If i look at recent apps some process kills everything so there is nothing there. No ad blocker or malware remover can find anything wrong or prevent the ads. I have also removed all the aps I have installed since the ads started. I am out ideas. Please help.

 

[belodion]

In spite of your uninstalling, try Safe Mode.