unknown character when composing email

one of our customer said me that he is experiencing problem when he composing email, he said that unkonwn sign appears when he press enter & dot sign for spaces, he says this is very annoying & hard to look at the document he types, so i involved the matter and fix the problem instantly, check below screenshot i got from his pc. (please click the image to enlarge)

so i configure some settings in the outlook 2003 and problems is gone, here is how i do it.

• click "new email message" button to compose email
• in the untitled message menu click tools > click option
• in the view tab check under formatting marks

see the picture

 

you can see in the picture there is a check box already selected for all under formatting marks , this is the problems, so i uncheck all and click ok, the problem is gone and i see a happy face.