I have some programmes on Desktop which now have blank icon infills to them. They are Word2013,Excel2013, PowerPoint 2013,Publisher2013 and Outlook2013. When I click on the Shortcut icon I get the message "The WINWORD.EXE that this shortcut refers to has been changed or moved so this shortcut will no longer work properly. Do you want to delete this shortcut?" Any advise please ? Thanks.