Handing on my new Surface Pro 4,I try to install ubuntu on it. But I lost my “Security” menu in UEFI while I try to boot from a PE in my USB stick.Then I get stuck in the “Restart to Surface UEFI” loop with a message ‘The security settings on Surface cannot be modified at this time. A restart is required to make changes to the security settings’. The default security settings menu no longer appear no matter how many times I restart. I googled as many as I can, but I still cannot find a way to fix this.