Hi. I was just dragging some items around the desktop into some folders in the Finder and I guess something got messed up. When I was finished moving things around, a small square icon appeared in the left hand corner of the screen that cannot be dragged to another location or deleted. Whenever I click, it a small screen pops up momentarily, saying that it's going to open a file (I deleted the file) and nothing happens. After I deleted the file, the small square box just contains a picture of a question mark. I'm trying to get rid of it, but I don't know how to. Any help would be appreciated!