The way to tell if that, is to try to boot your real computer from it.
I changed the BIOS to boot first from CD drive, then from hard drive. It still boots up in Windows 8.1, so I suspect that you are correct, the DVD is not bootable. I'll go have a chat with my software pirate next Wednesday when the street market opens again.
Apparently not, in my case...
NOTE: If you want to create bootable CDs of Windows, you will only be able to do that with Windows Vista or XP.
If I understand correctly (probably I don't!) if I can get my computer to boot in the Virtual Machine, I can then put the Windows 7 installation disk in the DVD player and run the setup.exe to install the OS. Or does the Virtual Machine have to have an OS already installed to boot into?
tanstaafl.