My experience is that I’ve used libreoffice to convert unreadable .doc 2003 files to working .docx documents. In these (admittedly few) cases, (a more recent ve

My experience is that I’ve used libreoffice to convert unreadable .doc 2003 files to working .docx documents. In these (admittedly few) cases, (a more recent version of) word could not read the .doc files in a meaningful fashion.