On you laptop Dan format your sd card to fat32 (insert into laptop and highlight it and right click and format) then follow the instructions from the link I posted to get the files downloaded and onto the sd card and then through the install process. It doesn't matter if your T8 is currently rooted or not, it will be if you install the entertainment box firmware correctly. Try and get that link have posted on you phone then you can be following the tutorial whilst using laptop and box to do on. Good luck