Somewhat off-topic..
I have been unable to access one of my Windows Live accounts (via Messenger and Mail) for the last couple of weeks with every attempt failing with a 80048820 error stating that the service was unreachable. Other accounts on the same machine connect successfully, and attempts to log-on from different devices result in the same message (for this account only). It appears that Microsoft have changed their approach to what is allowed in your Live Profile Name, and no longer support special characters (such as &). A quick review of this page should point you in the right direction if you are experiencing the same issues.