Hello.... extract all the contents and place them on your server i.e htdocs on xampp or www on wamp or their equivalent.

open the existing .env and add details to your database connection ie username, password, database name and database port default is 3306
then open the url of your installation path and clicnk on http://your url/foldername/public/install.
the installer should start

If it fails open your terminal and run the following commands

php artisan migrate:fresh
php artisan db:seed


then open your url http://your url/foldername/public
and register your business


========================NOTE=========================
To disable business registrations, change the .env file ALLOW_REGISTRATION  from true to false