Got broadband? cable? Any internet connection that is always on? I was visiting one of my regular reads The Luminous Landscape and Michael had an interesting link to a site that tests how secure your connection is.
Shields up! seem like a pretty cool service (and it’s free 
) It shows my system to be secure except for one area (and no I’m not going to say what it is!)
Give it a go.
clean bill of health on my pc dude!