Hi brand new device, plays TV fine. But .... I know how crazy this sounds. Yes, I am a Newbie. Yes I do feel a complete idiot even asking this question. Yes, I HAVE searched the forum. I am trying to just do the basic setup it walks me through in the user guide. I got as far as attaching a 1Tb drive (formatted for Win 10 on Win 10). But as the last step in every instruction in the guide it try (and that is lots of them) it ends up with ""press GREEN key to confirm the change". So I do. The Blocked symbol flashes up top right and stops me. Can anybody help please?