The actual shopware 5 is not working on a windows system (win7) with xampp (5.6.3). It installs correctly, front- and backend are ok, but if you like to do any procedure which saves data to the mysql database (especially to open a new admin user account in the backend) there is no data entry. On a linux system it works perfectly.
If you are on a Windows System the best way would be to install a Virtual Machine.
Shopware has already a working Vagrant Repo to install Shopware 5 with Vagrant within minutes.