MagicISO, mmm, in the past it has been installed. but not recently.
Device Manager reveals only my existing CD/DVD drives.
However, I have recently set my shared USB drive as mounted in one of the other drives because of drive letter changes when I forget to turn on the USB drive before plugging something else into a USB socket.
Although I the problem started to happen before that. (Actually thinking about it, it started a long time ago)
So it sounds like it's going to be something that got left-over from a program install then.
As I said, it does not effect the PC (that I am aware of) "it just annoys me being there"
So looks like I may have to live with it.
But I will try re-Ghosting the PC to a earlier time and see if that stops it from showing.
(Only problem is, MagicISO was installed and removed a long time ago, so it may not help)
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edit
I forgot to say, it does not necessarily show all of the time, just most of the time.