Note 5 not responding

[ComboWumbo]

This past week my Note 5 is being unresponsive lately. When I lock my phone (press power button.) It wont seem to wake up. I have tried hard resets but they only temporarily solve the issue. It rarely starts up, and once it does im afraid to turn it off again.
I also sometimes get the " a custom OS can cause critical problems etc" screen.
I've own the phone for 2 years and cant afford another one at the moment.

 

[yarnsrj]

May have to take it in to the store. Could be one of these few recent updates didn't completely install and they may have to force an update.