A family of Microsoft word processing software products for creating web, email, and print documents.
It sounds as though you haven't opened the normal template, but a document based on it. There are no Words in a normal template and it is already named normal.dotm, so you are just opening editing and saving it.
From the Word File menu > Open > navigate to the user templates folder shown in Doug's initial reply and open normal.dotm. Make the changes you require then save it. Close the template and now create a new document from it.
It also sounds as though you are trying to open the template from Windows Explorer. Don't do that. This will not open the normal template and if you create new documents from Explorer, rather than from Word, your normal template is not involved. Word uses its inbuilt defaults to perform that task. You need to open Word first.
With Word closed make sure that there are no orphan lock files - http://www.gmayor.com/what_to_do_when_word_crashes.htm