Yes, Ian, this should be in the Computers/Internet forum, so I'm going to re-direct it there. I'll leave a pointer in this forum.
WCollins, this topic (specifically the AvenueA issue) has been addressed in depth in the Computers/Internet forum. Here is a thread which will help you find your answers.
http://www.pprune.org/forums/showthr...5&pagenumber=1
FWIW, I (and many others, as you'll see when you go to the above link) also use spyware detection software (including spybot), and have NEVER had an alert regarding PPRuNe.