Alright, so, I have this tablet and it belongs to my grandpa which he uses for browsing and pretty general mainstream stuff, he complained that it was slow with advertisements constantly popping up and he gave it to me to get it fixed, I used the factory reset option in an attempt to bring everything to the way it was when it "got out of the factory", even though it appears that everything was done and since all apps are gone I assumed it was done but, a few seconds after going online(Note: It's not google restoring the applications because there's no google account logged in at all) it started downloading and installing applications on it's own and the same adverts were all over the screen as if I never did a factory reset, any ideas on how to get this solved would be much appreciated.