You see this error, when trying to sign-in, using Windows Live Messenger 9, or 9 Beta. We noticed it may also happen when you are already logged in.
Follow these simple steps:
– exit WLM 9, or previous version of MSN
– remove WLM leaked Beta version
– download latest full version from official site
– install WLM
This problem is Beta related, it’s nothing wrong with your settings and PC at all.