There is nothing to it (once you have done it a few times). Click on the download link on this page:
http://www.microsoft.com/downloads/details...;displaylang=enThere is a big download button. Click on it. When the dialog box pops up asking you to save, select your desktop as your location. Then save it. Once it is saved, find it on your desktop, then double-click on it to install. You may have to accept a license agreement, but other than that, the installation should go fine. Once it is installed, you should be able to open your word docs. If you run into a problem, make note of the problem, and any error messages (if any), and report back here.