I don't have any OS installed. I wanted to install Win10 but it failed with error code 0x80070570 during install.
Now, I want to go back to Ubuntu but I am not able to (Only Unetbootin screen shows with a 'Default' option, and no way to move forward). When I boot the computer I am not able to go to BIOS or Boot options even if under Dell logo it says F2 for Setup and F12 for boot options. I think Win10 enabled secure boot or fast boot (?!).
I am stuck! I can't go to UEFI firmware settings and I cannot boot Ubuntu USB stick. What can I do?
Is there a command that I can use in order to access UEFI firware settings next time I boot (I have a Win10 setup USB)?