Unlike basic versions, offers features as multi-touch, backup and restore through a managed interface, encrypt the disk, use the Group Policy and RDC to manage the PC better and access other computers from distance. The Pro version is in the middle and it is great for home users. Windows 7 has different flavors with different features, so you can choose between Starter, Home Basic, Home Premium, Professional, Enterprise and Ultimate. You will need a valid product key to install Windows.
This is the official setup or installation files for Windows 7 Pro (Professional).