MySQL service is gone

Enter the administrator cmd interface 

 Enter the bin directory of mysql installation

cd C:\Program Files\MySQL\MySQL Server 5.5\bin

Install the service first

mysqld.exe -install

Then run mysql again 

mysql -uroot -p密码

If an error is reported

ERROR 1045 (28000): Access denied for user ‘ODBC’@‘localhost’ (using password: YES)

Then maybe you forgot your password

Need to skip verification to enter

open administrator cmd

Enter the bin directory of mysql installation

cd C:\Program Files\MySQL\MySQL Server 5.5\bin

run

//跳过校验
mysqld --skip-grant-tables
//使用mysql数据库
USE mysql;
//更改密码
UPDATE USER SET PASSWORD=PASSWORD('你的密码') WHERE USER='root';
//刷写权限
flush privileges; 
//退出
quit