BPRd

Hello everyone, I have a major problem concerning function development. I'm currently using Image Configuration Editor to create windows 8 image. My question is : What can I add to have access (at reboot via ""-shutdown -r -o" or SHIFT+restart) to Troubleshoot option -> "Advanced options" -> "Startup options" and then reach "Disable driver signature enforcement" ? After clicking on "Troubleshoot", the only choice I have is BIOS/UEFI access (nothing I need..). I spent all day to search answers on internet but in vain. I already tried (as admin) bcdedit -set loadoptions DDISABLE_INTEGRITY_CHECKSBut it returns The boot configuration data store could not be opened.The requested system device cannot be found.Note that I'm running my personnal embedded version of windows 8, maybe I have to add anything in ICE ? Thanks for your help.