As said in the heading, Grub does not load at all when Secure Boot is enabled. There is an error message about security. Windows boots through UEFI.
This problem happens on a Lenovo T450s laptop, with dual-booting Windows and Ubuntu. Windows 8.1 Pro was preinstalled and updated to Windows 10 Pro, before the Ubuntu installation.
Boot-repair bootinfo summary: http:// paste.ubuntu. com/12879928
As said in the heading, Grub does not load at all when Secure Boot is enabled. There is an error message about security. Windows boots through UEFI.
This problem happens on a Lenovo T450s laptop, with dual-booting Windows and Ubuntu. Windows 8.1 Pro was preinstalled and updated to Windows 10 Pro, before the Ubuntu installation.