Are you using IIS or Apache? In IIS you need to point the IIS Default Website to your Moodle folder - this is if Moodle is the only website that you're running on the computer. Then you access moodle via http://yourcomputername or http://localhost
If you are running other websites on the computer then you need to create a new virtual directory for your Moodle website and point it to your Moodle folder. You'll access the Moodle site via http://yourcomputername/moodle or http://localhost/moodle (assuming you called the virtual directory "moodle").
Alternatively, if this is just a test machine (in other words, you're not using it for production) then you can use the Moodle for Windows package. This package contains Moodle plus all the other software needed to make Moodle run on Windows: Apache, MySQL and PHP. The disadvantage of using this package is that it doesn't teach you how to install Moodle the way that you would install it on a production server.