I've come back to Xbox360 and am trying to re-establish my account. I tried to change my current gamertag to my old gamertag (before I left xbox live), and I got the error "Gamertag in use by another user". I worry that the gamertag is still active under a Windows ID that I used to manage. Can anyone help me determine if I still own the old gamertag or if a new user has it? I understand that if a new user has it, I can't get it back.