Hello, I have a Samsung Tab S2 9.7in 32 GB. My tablet is curently stuck on the download... do not turn off target screen. How do I get rid of this screen and prevent this from happening again? I have tried re-rooting it and it just reboots to the same scren. Can anyone help?!?! I also get that security threat warning pop-up on my notifications panels. Any help with that as well?