Whenever I start a game, from both the disc and hard drive, my Xbox will say "Username signed out". What's wrong and how do I fix it? Just to be clear, it signs me out when I start a game. How can I stop this?
Xbox 360 – Why Does Xbox Keep Signing Out?
xbox-360xbox-live
Best Answer
It sounds like you've refused an Xbox Live Update at some point.
You can go into your system options and see if there's an update available.
To check for an update on the Xbox 360 you basically force a new Xbox Live connection:
You can also get console updates on the 360 through game discs with them, USB drives, or CDs and DVDs burned with the updates, but the above instructions are by far the easiest and should apply to most cases.
To check for an update on the Xbox One (since it has the same problem):
Source: The xbox support system and personal experience