It may be attributable to a historical bug that somehow seems to have Word misreading temporary files related to the printer currently in use. That being the case you can usually 'unscramble' the display from File=>Print and switch to the printer properties or to another printer then your normal one, or close Word and delete all files found on Start=>Search and looking for ~$*.*;*.tmp as the name string then restarting Word." See also
What to do when Word crashes