I have a very strange looking green icon in my menu bar. Right and left clicking has NO effect on it whatsoever. I can't get rid of it. I installed a virus checker and it hasn't found anything. It looks sinister. Can anyone help? Also, if you don't know what it is, can you tell me how to get rid of it at least? I attach a zoomed photo. Looks like a Parakeet to me with a + sign in the middle.