MySQL 5.5 Reference Manual
MySQL 5.5 Release Notes
After you choose an installation type and optionally choose your installation components, you advance to the confirmation dialog. Your installation type and installation path are displayed for you to review.
To install MySQL if you are satisfied with your settings, click the button. To change your settings, click the button. To exit the MySQL Installation Wizard without installing MySQL, click the button.
The final screen of the installer provides a summary of the installation and gives you the option to launch the MySQL Configuration Wizard, which you can use to create a configuration file, install the MySQL service, and configure security settings.