The hotmail account is incorrect

I have an old account to which i am fairly sure of the password but not 100%, however a friend of mine used this account to play a game and associated his account with it etc, the point is it requires the email address to be valid AND matched to a username, meaning the email is correct, now as i've said i haven't used it for a while so i dont know if it ever got hacked and it banned, or it's just old, or if it's some technical glitch but it seems quite common, i will disclose email in a private message to a mod or any person that can help, thanks.