MySQL安装提示一下错误

The security settings could not be applied to the database because the connection has failed with the following error.
　　Error Nr. 1045
　　Access denied for user 'root'@'localhost' （using password: YES）
　　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.

解决方法：

MySQL 5.1 安装过程中报apply security setting错误的解决办法
　　1, 卸载MySQL
　　2, 删除目录 C:\Documents and Settings\All Users\Application Data\MySQL
　　3, 重新安装MySQL 就OK啦