Glen wants to dual boot with Windows 7 and 10. Leo says it can be done. He can do the download and it should ask him if he wants to install Windows side by side. Will he be able to update both? Leo says absolutely. It'll be free, too, since the license is associated with the hardware and not the user. He'll have to update within the version he's using, though.
Glen should create his partition first. Then go into the Windows installer and choose the dual boot side by side option.