I just got a macbook pro. I installed some apps. I opened the applications folder from the dock and I attempted to drag the icon to the dock to create a shortcut there. My finger came off the track pad and the icon snapped over to the far upper left corner of the desktop. It's in the corner under the apple symbol on the menu bar. It's a transparent white square with a question mark in it. If I clicked on it it would open the app it's linked to. But I can't move it or delete it. If I right click a small window comes up showing the path to the app momentarily. I tried uninstalling the app and rebooting no luck. Looking in the desktop folder shows nothing. It looks stupid and it blocks the x-out of any app that is open full size. Can anyone help?