It seems to have a life all of its own; bricking and freezing my PC.
It must be just me, I find it works very well most of the time, but yes it has issues. It can be resource hungry!!:(
The latest issue was the unwanted desktop icon on W7, which has now gone.
note: I don't leave it configured as per it's default settings - if I can find a free AV that does what this does, I'll drop BTNP in a flash.