A family of Microsoft word processing software products for creating web, email, and print documents.
You need to use one of the Heading # styles for the headings and a different style (Body Text or Normal) for the "normal text".
See the article "How to create numbered headings or outline numbering in your Microsoft Word document" on the following page of the Late Shauna Kelly's website:
http://shaunakelly.com/word/numbering/numbering20072010.html?p=1768
and other articles on that site.