As a prerequisite, a MySQL database is already available.
Click the Next button.
If this is your first time using Joomla! you may want to click the Install Sample Data button (B) so that after Joomla! installs you can view a sample site.
Click the Next button when you are finished.
If the installation folder could not be removed, you can simply delete the installation folder via FTP.
You are now finished and can view the Joomla! site or log in to the Admin section.