This is the procedure for installing MySQL on Windows OS. ## Important Points 1. MySQL is supported from version 1.4.9.0 or later. Versions of Pleasanter before 1.4.9.0 do not support MySQL. ## Microsoft Visual C++ Download the redistributable package 1. Access the following URL. https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-170 2. Click on the latest supported x64 version fixed link and download the installer.  ## Microsoft Visual C++ Installation of the redistributable package 1. Run the downloaded file and install the latest Microsoft Visual C++ Redistributable package. ## Download MySQL 1. Access the following URL. https://dev.mysql.com/downloads/mysql/ 2. Select version "8.4.x LTS" 3. Click the "Download" button in the "Windows (x86, 64-bit), MSI Installer" row.  4. Click the "No thanks, just start my download." link to download the installer.  ## MySQL Installation 1. Run the downloaded file. 1. Click the "Next" button.  1. Check "I accept the terms in the License Agreement" and click the "Next" button.  1. Click the "Custom" button.  1. Change the installation directory as needed and click the "Next" button. (If there are no special requirements, simply click the "Next" button.)  1. Click the "Install" button.  1. Check "Run MySQL Configurator" and click the "Finish" button.  1. Confirm that the MySQL Configurator is running and click the "Next >" button.  1. Change the MySQL data directory location as necessary and click the "Next >" button. (If there are no special requirements, simply click the "Next >" button.)  1. Modify the Config Type, Connectivity, and Advanced Configuration as necessary, then click the "Next >" button. (If there are no special requirements, simply click the "Next >" button.)  1. Enter the root user password and click the 'Next >' button. The password you enter here will be used in the connection string settings of 'Rds.json', so make sure to note it down.  1. Change the Windows Service Name and Run Windows Service as... as needed, and click the 'Next >' button. (If there are no special requirements, simply click the 'Next >' button.)  1. Change the access rights of the MySQL data files as needed, and click the "Next >" button. (If there are no special requirements, simply click the "Next >" button.)  1. Change whether to create the sample database as needed, and click the "Next >" button. (If there are no special requirements, simply click the "Next >" button.)  1. Click the "Execute" button.  1. Wait until the installation is complete, then click the "Next >" button once finished.  1. Click the "Finish" button to complete this procedure.  ## Supported Versions |Supported Version|Body| |:--|:--| |1.4.9.0 or later|New documentation created to support MySQL|