I've had this again recently, I had it a while back too, I really don't know what it is though
This doesn't answer the question either:
http://www.neowin.net/forum/lofiversion/index.php/t284277.html
Edit: neither does this -
http://www.bullguard.com/forum/profiles/AlexSurfer_5171.html but it says how to stop the window from popping up, and I tried it and now I don't get the window anymore.