Chantal and Jared,
Can I ask how you installed Moodle and what the specs are for your webserver and databaseserver? Guillermo has provided some excellent information, I just wonder if there is something in the setup that might be causing issues.
Chantal - the screenshot you provided showed a tab with Moodle complete installation packages, was this how you installed Moodle? These packages contain everything you need to get started (i.e. webserver, database, php, and moodle) and are pretty solid if you are using them to try Moodle out and see what it is about. They do have some gotchas if you are not expecting them or have other software applications running that use web ports as Guillermo pointed out in an earlier post.
Tell us what you have and let's see if we can get you fixed up.
Scott