Whenever I attempt to shut down my computer, I get a pop-
up message that says "Someone is logged on to your
machine. Are you sure you want to log off?" I'm running
WinXP Pro as administrator and I'm wondering if this is
just me logged in or if in fact I have a vulnerability
that is being exploited which would allow others to hack
in. How can I tell if it is the latter? I have an allways-
on DSL internet connection.