Running Windows 10 from bootable DVD without installing on hard disk?
In order to use Windows you must first install it, you can't just boot from a CD and expect it to work. While that may be possible with some varieties of Linux, it is not with Windows (or macOS).

In order for us to help you you absolutely must provide the model of Mac you have and what version of macOS is installed on it. Edit your question and put that info there.