Introduction: The previous password and all the data must be removed if the password was forgotten. Requirements: MySQL server was installed, and then removed. Procedure: First, you must find the location of the files to delete. Method 1 of finding the files: Start the MySQL Installer, may navigate through all programs When installing, you may notice the location where the data was stored. While on the Installation tab, “Show Details >” and scroll up to see the installation directory. Method 2 of finding the files: Open Windows Explorer to browse to a directory. Type in the Address %appdata% or %programfiles% Removing the Data: Uninstall MySQL Server. Delete the folders that contained MySQL. Open Command line in admin mode. Open the start menu > All programs > Accessories > Right click Command Prompt > Open in admin mode Use the cd.. and cd FOLDER_NAME commands to navigate to the folder to delete Use the del /s MySQL command to delete the data and everything in it.