Adding Games to Groups while being offline not possible and system sounds can't be turned off

So you just turned off the system while still in the game? You could have accidentally turned it off while the game was saving. Which in almost all games it says "Do not turn the system off while saving".

sounds like you mighta turned it off while installing an update. can't blame microsoft if you're not patience enuogh to let it install updates.

I don't think you understand what I am saying. While I am in the middle of an online game, it suddenly just stuts off. I hear the sound when it turns on, and it shuts off. Ironically when I turn it on with the control it no longer makes any sound. You are trying to tell me it is perfectly normal for my system to shut off mid game in the 1st of 2nd game I play. That is not normal at all.... Thankyou for the reply

The first thing to do is turn off Instant On if it is enabled. That way nothing will be getting downloaded while the console is off. Not system or game updates,

Now this will allow you a little more freedom. System updates are going to be required if you want to game online, as will obviously the game updates. However if you simply want to play the single player portion of a title, you can forgo both system and game
updates and remain offline.

This is a more specific feedback thread about the start up sound.

xbox.uservoice.com/.../15220131-disable-xbox-one-startup-sound

It really is the biggest negative surprise of the update.