设置mysql5.5 错误代码2003都 重装n次了，也把东西都删除了，目录跟注册表都删了，删除之后又从新安装。
The security settings could not be applied to the database because the connection has failed with the following error.
Error Nr. 2003
Can't connect to MySQL server on 'localhost' (10061)
If a personal firewall is running on your machine, please make sure you have opened the TCP port 3306 for connections. Otherwise no client application can connect to the server. After you have opened the port please press [Retry] to apply the security settings.
If you are re-installing after you just uninstalled the MySQL server please note that the data directory was not removed automatically. Therefore the old password from your last installation is still needed to connect to the server. In this case please select skip now and re-run the Configuration Wizard from the start menu.
防火墙都关了重装n次了，也把东西都删除了，c盘也清除干净了！目录跟注册表相关mysql都删了，删除之后又从新安装。连迅雷都卸载了。帮帮吗吧！谢谢各位了！！！！！！
或者你以前是否安装了其他SQL服务器,比如MS SQL2005什么的, 端口已经被占用了,也会出现这种情况的.