Jira 8 comes bundled with the MySQL database driver, so you can skip this section. However, if you do need to manually install the driver for some reason, such as the driver file got corrupted or accidentally deleted, you can download the required driver from http://dev.mysql.com/downloads/connector/j/. Once downloaded, you can install the driver by copying the driver JAR file into the JIRA_INSTALL/lib directory. After that, you need to restart Jira. If you have installed Jira as a Windows service in step 9, refer to the Starting and stopping Jira section.