I finally solved my problem with the “unidentified” icon. It was related to the trackpointer and centre button on my trackpad, I have a Lenovo X1 carbon paptop. If I pressed the trackpointer I could get the icon the switch from horizontal to vertical (although I’ve no idea what the functional difference is) and by manipulating the trackpointer and the centre button on the trackpad (sorry, can’t remember the actual sequence) I got the “unidentified” icon to disappear. Yeh, I know, I’m woefully computer illiterate.