The version offered to download on this page is Windows 10 64-bit. Now, Microsoft allows you to download the ISO image of your system for free, which notably allows you to create a bootable USB of Windows 10 with which you can finally install Windows.
Computers used to be packaged with a Windows CD or, at least, a hidden partition allowing you to reinstall or update your system.
You may want to know how to download Windows 10 for free.
