Word Starter 2010 Margins Not Working?

I just bought a Toshiba lap-top, Windows 7, with Microsoft Word Starter 2010 pre-installed.In a blank document the pre-set margins do not function on the screen. When I type, the letters just keep going on and on to the right. If I look at the "print display" it shows the letters correctly on the page.If I customize the margins the same thing happens --- the margins do not stop the letters from just going on one line to the right into infinity.So, therefore, I do not have a WYSIWYG page view. How do I get the margins to work properly?