MySQL 5.7.9 Service failed to start-solution for "NET helpmsg 3534" _mysql

Installation process reference from: MySQL 5.6 for Windows uncompressed version configuration installation

After successful installation, start MySQL, enter:

Tips:

"The MySQL service failed to start and the service did not report any errors, please type NET HELPMSG 3534 for more help." ”

Check, enter in current directory:

Or a mistake, and checked again, the reason is:

mysqld --initialize-insecureAutomatically generates a root user without a password and mysqld --initialize automatically generates root users with random passwords. The Data folder is not empty to execute this command.

Solution:

Delete all files in the data directory first or remove them.

The MySQL service started successfully.

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