Windows doesn't tell you which program is using a file and prevents you from renaming, moving, or deleting a file while it is in use.

Fix Word cannot save or create this file Normal.dotm error occurs when saving an Office document by following the suggestions laid down in this post.

The file name or path does not exist The file is being used by another program The workbook you are trying to save has the same name as another Microsoft Excel cannot access the file ...