InDesign lock file is corrupted if computer sleeps with an open document with pending changes. App instructs to close the app and try again. When InDesign starts and you try to open last opened file, App states that I don't have permission or the file may already be opened. All you can do is copy the file, but all pending changes have been lost. Cannot delete the lock file in order to access original file. This is a continuing problem. (Surface Book, Win 10 2004 release)