Hi folks! First post here, so be kind! Just unboxed my brand new MBP 15" and noticed an oddity? Keep in mind I'm a Mac virgin but under "Shared" in Finder I seem to have a volume called "thomson" that when I go into its settings says I'm signed in as a Guest and that its a PC Server? I'm connecting wirelessly through a BT Homehub which isn't connected to anything else at all! Anybody shine some light? Thanks!