Since I was asked to download updates from the 'one app' from Samsung I've been flooded with targeted adverts. I managed to disable it and if I don't update from 'one iu' it's all good.
I never turn my phone off,restart or update and I never use any cloud storage,this way normally works for me. I just won again,I keep on pressing the 'x' button and it can't keep up. Don't press the forum update facility in the top right corner because this makes it easier for it to interfere I think.