I just installed the Windows 8 Consumer Preview. Just going through the default procedure, I let it use my Xbox Live account to create a user.
When I then went and turned on my Xbox, it now notified me that I was logged into Messenger in two locations.
I went back to Windows 8, and turned my Live account into a local account on that machine. But when I then turned the Xbox again, I got the same message.
Is there a way to just 'sign out of messenger' on Windows 8? Or is there a location to even see where I am signed in at?