I just purchased the $39.99 download of the official final release version of Windows 8 Pro, which I downloaded to an existing Windows 7 virtual machine. The Windows 8 installer asked me if I wanted to install in-place, save an .iso or burn a disk, or prepare a USB thumb drive for installation. I chose the USB thumb drive option, and Windows 8 Installer formatted and installed the thumb drive. Now I can't get Parallels Desktop 8.0.18101's new virtual machine installer wizard to recognize the thumb drive. It seems that Parallels 8 will only do an install from a DVD or an .ISO image. What can I do to get Windows 8 installed under Parallels 8?