For quite a while now, whenever I'd check the window which shows me the list of Notification Area Icons, and offers me a choice to show or hide them, I've noticed that there was a lot of stuff on there which got left behind when old programs got turfed out but didn't properly remove all their little scattered bits. Things like this probably shouldn't bug me so much, but they do.
So today, I went Googling for solutions to that one, and found there really is one, and you can find it by clicking here.
When you're all done, and go onto that window for the Notification Area Icons again, you'll find that it's now all correctly displaying only those items which you are still actively using, not a bunch of junk left behind by departed programs.
Just be careful while editing your Registry, because mistakes in there can have some nasty side-effects, and I'm trying to help you avoid those. And before I forget to mention this, be sure you do a reboot right after you've restarted your explorer.exe to make sure that everything is refreshed and up to the minute, and really will show you only the latest list of items.
This is what mine looks like now that it has been cleaned up and shows what's actually there.