Troubleshoot Kinect sign-in problems on your Xbox 360 console
If you are not automatically signed in
When you wave to your Kinect sensor, you are not signed in to your profile. To fix this problem, set up your Kinect ID to automatically sign you in. See Automatic sign in with Kinect for more information.
If the problem continues, make sure your play space and face are well lit and your face is not obscured.
If you are signed in to the wrong profile
When you wave to Kinect, you are signed in to someone else’s profile. To fix this problem, try the following:
Turn off Kinect ID sign-in for your profile. Here’s how:
Go to the settings hub, and select System.
Select Sign-In Preferences.
Select Off for Kinect ID. This will delete the Kinect ID for your profile.