Hey bro i hope i am not late hahaha cus its been 2 years from this post but i think i know the solution for your problem ,
go to your BIOS/UEFI and try to disable the secure boot .
Type: Posts; User: aiden pearce
Hey bro i hope i am not late hahaha cus its been 2 years from this post but i think i know the solution for your problem ,
go to your BIOS/UEFI and try to disable the secure boot .