AccountKiller
Enlace de la terminación directa: https://account.live.com/CloseAccount.aspx
Publicly visible text/images often aren't properly deleted even when you succeed in deleting an account. Try editing or deleting them manually before deleting the account itself. If you're unsure what happens to your tracks you can always contact MSN / Messenger and ask personally. By the way, deletion requests don't necessarily mean your data will actually be deleted (e.g. due to legal obligations).
Si no puede encontrar ninguna información de contacto y todavía desea hacer algo (por ejemplo, una pregunta acerca de lo que se elimina, sobre la retención de datos, etc.,), usted puede contactar a los propietarios de dominio utilizando esta información.