Installing Joomla! is a simple thing.
1. First, go to http://localhost/joomla15.
2. Select your language on step 1 and press "Next" at the top.
3. Make sure that there are no red items on step 2 (if you set up with XAMPP, you
    should already be fine) and press "Next" to proceed.
4. Read over the license in step 3 and press "Next."
5. On the "Database Configuration" page, enter the following details, then press "Next:"

6. Skip over step 5 and press "Next" to proceed to step 6.
7. Enter the site name "Landscape Smart!”, then the e-mail address and admin
    password of your choice. NOTE: DO NOT PRESS "Install Sample Data!"
8. Press "Next" to complete the installation.
9. IMPORTANT: Open up the location where you unzipped Joomla! (usually
    C:\XAMPP\htdocs\joomla15 or C:\Program Files\XAMPP\htdocs\joomla15) and
    delete the "installation" directory:

10.Return back to the installer and click on "Site."
    If you completed the install successfully, you should now see a blank page ready
    for all your Joomla! content!