I left the view of the Kinect and came back, and now it's telling me "New player in the mix? Raise both hands to change gamer profiles." When I try to sign in again, my Gamertag isn't listed. What do I do?

Sometimes the Kinect won't recognize you if your clothing or the lighting in the room has changed. You're actually still signed into your Gamertag, but to make sure that Kinect will still recognize your body throughout the gaming session, go ahead and raise both hands.

If you don't see your Gamertag listed, don't panic - all that means is that there isn't any visual data for KinectID to recognize you with yet. Just choose 'Select Another Profile" and re-select your profile. Kinect will then scan you and add your appearance to its database so it can recognize you again in the future.