MySQL忘记密码的解决方案：

1.在操作系统windows操作系统，xp或win7.中进入如下目录：

C:\Users\Administrator>cd C:\Program Files\MySQL\MySQL Server 5.5\bin

 2.停止MySQL服务

C:\Program Files\MySQL\MySQL Server 5.5\bin>net stop mysql
MySQL 服务正在停止.
MySQL 服务已成功停止。

3.跳过授权给表

C:\Program Files\MySQL\MySQL Server 5.5\bin>mysqld --skip-grant-tables
 你会看到窗口光标在下一行的第一个位置闪烁，这说明已经启动了，不需要管。

4. 新建一个命令行窗口同样进入到e:\mysql5.5\bin目录，启动mysql 

C:\Program Files\MySQL\MySQL Server 5.5\bin>mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.5.36 MySQL Community Server (GPL)
 
Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
 
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
 
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.00 sec)

5.选择mysql数据库

mysql> use mysql;
Database changed
mysql> update user set password=PASSWORD('root') where user='root';
Query OK, 2 rows affected (0.00 sec)
Rows matched: 2  Changed: 2  Warnings: 0
 
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

 6.退出mysql终端：

mysql> quit
Bye

7.看看那任务管理器中是否有mysqld.exe进程，如有，kill .

9.启动mysql服务器

C:\Program Files\MySQL\MySQL Server 5.5\bin>net start mysql
MySQL 服务正在启动 .
MySQL 服务已经启动成功。

 10.登录mysql服务器

C:\Program Files\MySQL\MySQL Server 5.5\bin>mysql -u root -p root
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.5.36 MySQL Community Server (GPL)
 
Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
 
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
 
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 
mysql>

总结一下：就按照如上的10步骤，往下走就ok，祝你成功。