Just a heads up, im on Lenovo y50 UHD , and i had someone unlock advanced bios...
if you're trying to disable secure boot, you have to be in UEFI mode (not UEFI first) for the option to show up, when i tried disabling secure boot and then switching back to legacy mode, the option ofcourse disappeared, so I switched back to UEFI mode and the secure boot was enabled .... i'm not sure if it is ACTUALLY reverting the secure boot preferences when switching to legacy mode, but thats what it appears as
Im using the Lenovo y50p-70 . I followed the guide as well as I could up until final config:
It said no such directory exists
Im not sure if my laptop is 1080 or 4k. I think its the mainland Chinese version.
works fine with USB but fails when booting from internal drive.