mysql service 不见了

参考以下命令：

5.1及后续版本：

D:\MySQL\bin>mysqld.exe -install

Service successfully installed.

D:\MySQL\bin>net start mysql

5.0版本：

D:\MySQL\bin>mysqld-nt.exe -install

Service successfully installed.

D:\MySQL\bin>net start mysql

MySQL 服务已经启动成功。