windows MySql 5.7.9，启动不了。缺少data?报错

看到mysql5.7.9发布了，下了windows的zip，解压后真的没有Data目录。手动建data目录，启动报错
2015-10-22T06:17:52.071875Z 0 [Note] Plugin 'FEDERATED' is disabled.
mysqld: Table 'mysql.plugin' doesn't exist
2015-10-22T06:17:52.073875Z 0 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
2015-10-22T06:17:52.074875Z 0 [Note] Salting uuid generator variables, current_pid: 5788, server_start_time: 1445494669, bytes_sent: 0, 
2015-10-22T06:17:52.082876Z 0 [Note] InnoDB: not started
2015-10-22T06:17:52.087876Z 0 [Note] Generated uuid: 'a00cc8aa-7884-11e5-ba54-f0def1613030', server_start_time: 1445500457, bytes_sent: 171092576
2015-10-22T06:17:52.089876Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: a00cc8aa-7884-11e5-ba54-f0def1613030.
2015-10-22T06:17:52.094876Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2015-10-22T06:17:52.095876Z 0 [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key
2015-10-22T06:17:52.096876Z 0 [Note] Server hostname (bind-address): '*'; port: 3306
2015-10-22T06:17:52.097876Z 0 [Note] IPv6 is available.
2015-10-22T06:17:52.098877Z 0 [Note]   - '::' resolves to '::';
2015-10-22T06:17:52.098877Z 0 [Note] Server socket created on IP: '::'.
2015-10-22T06:17:52.099877Z 0 [Warning] Failed to open optimizer cost constant tables


2015-10-22T06:17:52.102877Z 0 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
2015-10-22T06:17:52.103877Z 0 [ERROR] Aborting

mysql根本没有启动成功，所以运行mysql_upgrade 并没有什么用。

是在windows下，配置文件是my-default.ini，没有改动过都是默认值 。 启动mysqld --console，会在data目录下创建系统默认的数据库文件。但是就会提示上述错误信息，并且abort。

创建的数据库文件一共只有5个，并没看到相关表的文件：auto.cnf,ib_buffer_pool,ib_logfile0,ib_logfile1,ibdata1

大神们，怎么弄？

我对mysql不熟，麻烦大家了。问题解决了。谢谢@Tuesday的帮助：

先将my.default.ini改名为my.ini放到bin目录 命令行执行: mysqld --initialize --user=mysql --console 先执行以上命令, 生成库. 注意有个临时密码, 要记下来. 然后启动服务.  然后再命令行: mysql -uroot -p 输入密码