mysql-5.7.10-winx64
启动 mysqld.exe，报错：
mysqld: Could not create or access the registry key needed for the MySQL application
to log to the Windows EventLog. Run the application with sufficient
privileges once to create the key, add the key manually, or turn off
logging for that application.
加参数 mysqld.exe --console，查看启动 log
[ERROR] Cannot open Windows EventLog; check privileges, or start server with --log_syslog=0
第一个 [ERROR]，关于Windows EventLog，忽略
[ERROR] Can‘t open the mysql.plugin table. Please run mysql_upgrade to create it.
第二处 [ERROR]，mysql.plugin
第三处 [ERROR]，Table ‘mysql.user‘ doesn‘t exist。可以判断初始化出了问题
mysqld --initialize
问题解决~
原文：http://www.cnblogs.com/yYang365/p/5105060.html