Hello JPFeidal,
Many computer manufacurers include a Trial of Office on their computers. It is up to you to convert the Trial to a perpetually licensed product by purchasing a perpetual license. You can buy directly from Microsoft or you can buy full packaged
product from your favorite store and install that. If you happen to buy the same edition that came as a Trial, you can skip installation and just use the product key to convert your trial to the perpetually licensed product.
If you are under the impression that a full perpetually licensed installation of Office was to be included with your purchase, you need to take that up with the place of purchase.
Buy Office 2007 Now, Get Office 2010 Free http://office2010.microsoft.com/en-us/tech-guarantee/microsoft-office-2010-technology-guarantee-FX101825695.aspx?CTT=97