Windows 10 Boot from external dvd drive?

[jarryd.ms]

Can I boot Windows 10 on a brand new pc from an external dvd drive or does it need the drivers installed on the PC for that to work? Recently built a PC and the windows 10 usb drive I bought doesn't work.

 

[Petrossa]

The USB drive doesn't work how?
You're not meant to right away get a desktop, rather, it should boot into the Windows Installer.