1. 管理員登陸系統(tǒng)，停止 MySQL 服務(wù)或者結(jié)束 MySQL 進(jìn)程。
2. 啟動 WINDOWS 的命令行窗口（即通常的 DOS 窗口：運行cmd），切換到你的 “MySQL/bin” 目錄下。 例如我的是 “D:/Program Files/MySQL/MySQL Server 5.2/bin”，然后執(zhí)行下面的粗體的命令：（注意你的 “my.ini” 位置）
Microsoft Windows XP [版本 5.1.2600] (C) 版權(quán)所有 1985-2001 Microsoft Corp.
C:/Documents and Settings/Administrator>cd D:/Program Files/MySQL/MySQL Server 5.2/bin
C:/Documents and Settings/Administrator>d:
D:/Program Files/MySQL/MySQL Server 5.2/bin>mysqld --defaults-file="D:/Program Files/MySQL/MySQL Server 5.2/my.ini" --console --skip-grant-tables
100608 9:04:12 InnoDB: Started; log sequence number 0 46409 100608 9:04:12 [Note] mysqld: ready for connections. Version: '5.2.0-falcon-alpha-community' socket: '' port: 3306 MySQL Community Server (GPL) 100608 9:06:57 [Warning] Found invalid password for user: 'root@localhost'; Ign oring user
Microsoft Windows XP [版本 5.1.2600] (C) 版權(quán)所有 1985-2001 Microsoft Corp.
C:/Documents and Settings/Administrator>cd D:/Program Files/MySQL/MySQL Server 5.2/bin
C:/Documents and Settings/Administrator>d:
D:/Program Files/MySQL/MySQL Server 5.2/bin>mysql -u root mysql Welcome to the MySQL monitor. Commands end with ; or /g. Your MySQL connection id is 1 Server version: 5.2.0-falcon-alpha-community MySQL Community Server (GPL)
Type 'help;' or '/h' for help. Type '/c' to clear the buffer.
然后，就是重新設(shè)置密碼了！
mysql> UPDATE user SET Password=PASSWORD('root') where USER='root'; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0
4. 好了到此步，可以關(guān)閉第一個 DOS 窗口了（關(guān)閉服務(wù)）。打開系統(tǒng)服務(wù)控制窗口（控制面板--管理工具--服務(wù)），啟動 MySQL 服務(wù)。
5. 在剩下的第二個 DOS 窗口中，用新的 ROOT 密碼連接 MySQL。
D:/Program Files/MySQL/MySQL Server 5.2/bin>mysql -u root -p Enter password: **** Welcome to the MySQL monitor. Commands end with ; or /g. Your MySQL connection id is 1 Server version: 5.2.0-falcon-alpha-community-nt MySQL Community Server (GPL)
Type 'help;' or '/h' for help. Type '/c' to clear the buffer.
