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With a fresh Windows 10 machine (Lenovo H50-55) I did a dual-boot install with Fedora 23. The installation seemed to go fine, but when I rebooted it went straight to Windows as if there was no GRUB. When I used Boot-Repair it found both Windows and Fedora on the machine, and its "repair" option chugged away, but it didn't fix the problem after a reboot; in fact, in comparing the Boot Info files from before and after the repair attempt it seems there wasn't really any changes.

EDIT: I also encountered the same problem after upgrading my machine's BIOS.

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I followed these instructions from It's F.O.S.S. to use bcdedit in an admin-priveledged command prompt, but with a slightly different path since it was Fedora instead of Ubuntu:

bcdedit /set {bootmgr} path \EFI\fedora\grubx64.efi

When I next rebooted I got to GRUB, which allowed me to boot into either Fedora or Windows.

EDIT: The same solution also worked after GRUB was ignored after upgrading my machine's BIOS.

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Some new laptop has new features which is secure boot. Disable it from bios and boot the system. More information can be find at https://blog.malwarebytes.org/security-world/2014/05/uefi-secureboot-and-dual-booting-windows-8-and-linux/

  • I'd tried disabling secure boot, it didn't help. – Matthew Cline Jun 8 '16 at 23:17

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