The service already exists! The current server installed:

当安装mysql的时候出现这种情况

D:\javasoft\mysql\bin>mysqld install
The service already exists!
The current server installed: D:\mysql-5.7.37-winx64\bin\mysqld MySQL

解决方案

执行这两条命令

sc query mysql

sc delete mysql

接着执行mysqld install

附带mysql8修改密码指令

ALTER USER 'root'@'localhost' IDENTIFIED BY '你的密码';