When trying to install SharePoint 2013 on Windows Server 2012 R2, the administrator might want to know if all the necessary software components are installed on the machine.
How to ensure and verify that the administrator has the necessary prerequisites for Installing SharePoint 2013 on the machine?
Microsoft SharePoint 2013 Setup has the Prerequisites Installer Application (PrerequisiteInstaller.exe) which can generally be found in the root folder of the SharePoint 2013 installation file / media.
Just double click and open this file .This will open the Microsoft SharePoint 2013 Products Preparation Tool which will check your system for the required product and updated. Additionally, it may also try to connect to internet and download products from Microsoft Download Centre, installs and configures the necessary files.