Q: In Finder, Desktop, it shows a zillion photos ...jpgs.. all greyed out.  I have no idea how they got there and they have been a nuisance since I cannot seem to get them off.  Tried dragging them to the trash, didn't help.

In Finder,  Desktop,  a zillion photos show .  I have no idea how they got to the desktop but have not been able to get rid of them.  They are listed as greyed out.  ON the Desktop I tried dragging them to the Trash.  If I try to empty trash, 'some of the items you are moving are in use by another application. etc.."  and now,  another, Copy   "Preparing to undo "move to Trash".