Okay, this is a long error, but I beg that you help. Okay, recently, I was playing Crysis 2 after a long period of inactivity. Some guy sent me an offensive message and I replied defending myself. Well, before he wrote back, I got off. Well, today I tried to get back on. At first, my profile didn't appear on the list. Then, after entering and exiting, it appeared with no avatar and 0G. When I clicked on it, it opened up the list of profiles where mine wasn't listed. If I closed it, then it would sign me in without connecting to Xbox LIVE and there would be no Gamer score/Avatar. I then moved my account to my hardrive (It was previously on a thumb drive that I always leave in the console.) and the same error persisted. I tried recovering my gamertag when I received this error message; " The Xbox LIVE Sign-up is Currently Unavailable."
Okay, there is no way that this is true because I attempted recovering my brothers account and it worked fine. (NOTE: It's not doing this for him)
I was then able to determine that someone had accessed my Windows LIVE without my permission, as for my password was changed. I did some editing and locked whoever it was out of my account (Yay!).
Please, if you have a diagnosis, then I beg that you post it.