If the MySQL Configuration Wizard detects an existing my.ini file, you have the option of either reconfiguring your existing server, or removing the server instance by deleting the my.ini file and stopping and removing the MySQL service.

To reconfigure an existing server, choose the Re-configure Instance option and click the Next button. Your existing my.ini file is renamed to mytimestamp.ini.bak, where timestamp is the date and time at which the existing my.ini file was created. To remove the existing server instance, choose the Remove Instance option and click the Next button.

If you choose the Remove Instance option, you advance to a confirmation window. Click the Execute button. The MySQL Configuration Wizard stops and removes the MySQL service, and then deletes the my.ini file. The server installation and its data folder are not removed.

If you choose the Re-configure Instance option, you advance to the Configuration Type dialog where you can choose the type of installation that you wish to configure.