This tutorial helps you how you can make composer global for all windows user. We are giving you all knowledge of composer as well as how to do research.
This tutorial teaches you how to make PHP global for windows user.
You can also learn about permission section that is occurred while making global for the composer.
Laravel documentation
https://laravel.com/docs/5.4
Compposer
https://getcomposer.org/download/
PHP Global
SET PATH=%PATH%;C:\your PHP bath