Spell Check feature in Outlook Express use components from Microsoft Word or MS Office to function. If you do not have MS Office or Word install, spell check feature in Outlook Express will NOT work.
You can easily overcome this issue by installing free addon ‘Spell Check for Outlook Express’. It is a standalone application for Outlook Express for spell check functionality.
Using this add-on application you can use spell check within Outlook express without having to pay for and install MS Office or Word.
Program is very basic and does job of spell check in an excellent manner. A must have for Outlook Express users ‘Spell Check for OE’. Alternatively, you can tryout SpellOE application with similar functionality.