Did you ever find a way to turn off the notifications? I have exactly the same problem....the picture quality is fine, except for a massive message in the middle of my screen every 2 minutes with no way to turn it off. I can't do anything to improve my signal, it's just my area. I've never had any issues with previous boxes (not BT)....I don't need to improve my signal...just need to turn off these notifications....I don't need to be told if my image quality is poor....I have eyes! I think we will have to change to a standard freeview box as we've given up trying to watch our TV, we just watch on my laptop instead...it's ridiculous!