OK, I will send the exact message from the screen later when I do the procedure again. It didn't look so informative so I didn't save it the last time.
For your info I did all the procedure from the post:
1. I made a bootable USB Stick
2. Copied the "boot.iso" for K3 into the existing "efi/boot/" directory on the Kubrick USB stick.
3. Booted laptop from the Kubrick device, or I thought it was booted. When the boot from USB is selected the boot process started, some data is listed on the screen for some time and an ERROR message appears on the screen. I will send the exact message later... K3 was connected to laptop during the boot process.
4. "
The debrick wizard should start automatically.The only keys you really need from there on are the arrow keys,and the ENTER key. Follow the instructions on the screen."
I was not offered to choose any selection, arrow keys or other commands.
I use WIN7 professional on a HP laptop that came without preinstalled system.