windows下的忘记MYSQL密码的重设办法(mysql4.0.X版本下)

Windows:
1.用系统管理员登陆系统。
2.停止MySQL的服务。
3.进入命令窗口，然后进入MySQL的安装目录，比如我的安装目录是c:mysql,进入C:mysqlbin
4.跳过权限检查启动MySQL，
c:mysqlbin>mysqld-nt --skip-grant-tables
5.重新打开一个窗口，进入c:mysqlbin目录，设置root的新密码
c:mysqlbin>mysqladmin -u root flush-privileges password "newpassword"
c:mysqlbin>mysqladmin -u root -p shutdown
将newpassword替换为你要用的root的密码，第二个命令会提示你输入新密码，重复第一个命令输入的密码。
6.停止MySQL Server，用正常模式启动Mysql
7．你可以用新的密码链接到Mysql了。

C:\mysql\bin>mysql  -uroot
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4 to server version: 4.0.15-nt

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

mysql> update user set password=password('root') where user='root';
ERROR 1046: No Database Selected
mysql> use mysql
Database changed
mysql> select host,user from user;
+-----------+------+
| host      | user |
+-----------+------+
| %         |      |
| %         | root |
| localhost |      |
| localhost | root |
+-----------+------+
4 rows in set (0.02 sec)

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 (0.02 sec)

mysql> quit
Bye

C:\mysql\bin>mysql  -uroot
ERROR 1045: Access denied for user: 'root@localhost' (Using password: NO)

C:\mysql\bin>mysql  -uroot -proot
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 6 to server version: 4.0.15-nt

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

mysql> quit
Bye

C:\mysql\bin>