Outlook Express is an email client made by Microsoft. It allows you to filter your Web based email into the application where you can manage your messages. The application is found in your "Start" menu, where you will find all of the programs installed on your computer.
Click the "Start" button in the lower left corner of your desktop.
Scroll up and click "Programs" or "All Programs".
Scroll over and look through the list of programs for Outlook Express. It will be accompanied by an icon that looks like an envelope with a blue arrow around it. If you do not find Outlook Express in the list of programs that appears above the "Start" button, click on the "Accessories" folder and look there.