I thought this was a straightforward question (maybe too basic?). Anyway, for those other new users, I did the install using a USB with the iso image (not a bootable USB) and using the Parallels "Install as Image File" option, it worked fine. The installer found the iso image on the USB and it installed without any problems. I am not sure what advantage there is to going through the extra steps needed to create the bootable USB. Also, when I was installing Parallels and Windows, the Microsoft Windows USB/DVD tool was unavailable due to MS updating their website - further complicating the bootable USB option. Hope that helps someone.