I was excited to see that osCommerce was being re-born with this version 4, but sadly as others above have noted there seems to be an issue with installing on Xampp on Windows! Install message says:
Does anyone know what the technical issues are that prevent it from running on Xampp? Is it because it requires composer, or the use of symlinks, etc? I use Xampp for many other platforms including several old versions of osc (with security updates), I think it's a serious disadvantage if it's not possible.