I see there's a couple of threads on this matter, but thought I should start a separate one.
I have a functional USB WindowsToGo workspace that boots no problem on a PC & Mac, yet it will not in Parallels even having followed their own instructions. I also have a USB HDD with Windows 10 on it that neither will boot in Parallels.
Error is :
Boot Failed: EFI Harddrive.
Boot Failed: DVD/CD ROM
PXE.DCHP
Won't boot either if 'EFI' is unselected in the settings.
Last edited: Apr 13, 2016