Windows mysql提示：1045 access denied for user 'root'@'localhost' using password yes

http://blog.csdn.net/japanstudylang/article/details/8024443

关闭mysql服务

net stop mysql

在任务管理器里结束mysql进程

到WINDOWS的命令行了（‘DOS’ 下），切换到你的MySQL bin目录下。 比如我的是 C:\Program Files\MySQL\MySQL Server 5.1\bin
然后敲下面的粗体的命令。注意你的my.ini位置。

C:\Program Files\MySQL\MySQL Server 5.1\bin>mysqld --defaults-file="C:\Program
Files\MySQL\MySQL Server 5.1\my.ini" --console --skip-grant-tables
090515 22:06:09 [Warning] The syntax '--log' is deprecated and will be removed i
n MySQL 7.0. Please use '--general_log'/'--general_log_file' instead.
090515 22:06:09 [Warning] The syntax '--log_slow_queries' is deprecated and will
be removed in MySQL 7.0. Please use '--slow_query_log'/'--slow_query_log_file'
instead.
090515 22:06:09 [Warning] The syntax '--log' is deprecated and will be removed i
n MySQL 7.0. Please use '--general_log'/'--general_log_file' instead.
090515 22:06:09 [Warning] The syntax '--log_slow_queries' is deprecated and will
be removed in MySQL 7.0. Please use '--slow_query_log'/'--slow_query_log_file'
instead.
090515 22:06:09 [ERROR] The update log is no longer supported by MySQL in versio
n 5.0 and above. It is replaced by the binary log. Now starting MySQL with --log
-bin='' instead.
090515 22:06:09 InnoDB: Started; log sequence number 0 324221
090515 22:06:09 [Note] mysqld: ready for connections.
Version: '5.1.33-community-log' socket: '' port: 3306 MySQL Community Server
(GPL)

看到这个结果就说明MySQL已经起来了。
再开一个DOS窗口，同样切到mysql bin目录下，
C:\Program Files\MySQL\MySQL Server 5.1\bin>mysql -uroot mysql   (解释： -uroot mysql    后面这个mysql指的是连接到mysql库，因为跳过权限验证，所以这时候可以不用密码就可以登录mysql)
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.33-community-log MySQL Community Server (GPL)

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql>

到这，你就继续按 方法一：操作就行。update完表后，退出

记得每个语句后面加分号

mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root';
mysql> FLUSH PRIVILEGES;
mysql> quit 

然后
C:\Program Files\MySQL\MySQL Server 5.1\bin>mysqladmin shutdown

然后停掉第一个cmd窗口的mysql，按CTRL+C 停止mysql

Version:  MySQL Community Server
(GPL)

看到这个结果就说明MySQL已经起来了。

之后在Windows服务管理器里正常启动MySQL服务就行了。