Installation for Windows 10, you won't have a Windows 10 product key, and you can skip the product key page by selecting the Skip button.
In this case, if you format the same PC later on to do a clean If you want to benefit from FREE upgrade Option, you must run the setup.exe from inside the Windows 7 / 8, perform the Upgrade and make sure that you successfully activate the Windows 10. If you want to install Windows 10 or re-install Windows 10, you will need to create a Bootable USB Stick or a Bootable DVD for Windows 10. How to Create a Bootable USB Stick or a Bootable DVD:
