So i gave this guy my info for the MW3 prestige glitch and he did the glitch and I thought everything was fine.But recently my account has been signed into when I'm not home. I have no siblings and my dad does not play video games. I have changed all the windows live information I can think of and somehow my account is still being messed with because my classes are being changed and stuff. I am just looking for help because if this person has my windows live id and password he has my credit card info and everything which really scares me. If anybody has any suggestions I would really appreciate it. By the I have contacted Microsoft and they said to change my secret question which I did. They said if he keeps signing in they would have to launch an investigation which I really don't want to go through. Again please respond if you can help me. Thank You TTG