应该是mysqld出了问题,不用注销,重启服务就行。C:\mysql\bin>mysqld-nt remove
Service successfully removed.C:\mysql\bin>mysqld-nt -install
Service successfully installed.C:\mysql\bin>net start mysql
MySQL服务已经启动成功。C:\mysql\bin>mysql
Welcome to the MySQL monitor...
Service successfully removed.C:\mysql\bin>mysqld-nt -install
Service successfully installed.C:\mysql\bin>net start mysql
MySQL服务已经启动成功。C:\mysql\bin>mysql
Welcome to the MySQL monitor...
http://community.csdn.net/Expert/FAQ/FAQ_Index.asp?id=5988