IIS WordPress MySQL root password is Invalid


  1. You are installing WordPress via IIS Web Platform Installer
  2. On the PREREQUISITES section, it shows that MySQL is not installed, you specify a password.
  3. After WPI downloads and installs, it shows the error message “password for user account ‘root’ is not valid” on INSTALL section.
  4. You try different stronger passwords and it yields the same error.
  5. When you look at the log, you see the error: “The security settings cannot be applied.”


  1. In my case, I go to Control Panel –> Program and Features
  2. Uninstall MySQL 5.1. 
  3. Delete C:\Program Files\MySQL
  4. Delete C:\ProgramData\MySQL (WARNING: THIS WILL DELETE ALL YOUR MYSQL Database data files. Don’t do this unless you are sure).
  5. Reinstall WordPress Application via IIS Web Platform Installer.
  6. If everything is OK, you should see the following screen:




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