Existe uma pista nesta linha:
I looks something like: - Fedora (...) - Fedora (...) - Fedora (rescue...) - Windows Boot Manager
Isso significa que você ainda não está dentro do Gerenciador de Inicialização do Windows onde o BCDEdit pode alcançar.
Parece que você está procurando algo na BIOS \ UEFI.
Experimente a resposta deste tópico:
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COLAR DE OUTRO FIO:
You should be able to do this via a Live Ubuntu CD.
Install efibootmgr:
sudo apt-get install efibootmgr
Then add to the kernel efi support
sudo modprobe efivars
Then run sudo efibootmgr to check your boot entries. It will return
something like this:
BootCurrent: 0004
Timeout: 2 seconds
BootOrder: 2001,0003,0005,0006,0000
Boot0000* Lenovo Recovery System
Boot0001* EFI Network 0 for IPv6 (B8-88-E3-84-F3-EF)
Boot0002* EFI Network 0 for IPv4 (B8-88-E3-84-F3-EF)
Boot0003* Windows Boot Manager
Boot0004* EFI USB Device (SanDisk)
Boot0005* ubuntu
Boot2001* EFI USB Device
Then delete the option you dont want. In this example, Ubuntu is entry
5. the following could be called to delete entry 5 and remove it from the BootOrder.
(CAUTION: Before executing the following command make sure you enter
the correct Boot entry number)
sudo efibootmgr -b 5 -B
Further details described here: http://linux.die.net/man/8/efibootmgr
Note: as for anything that changes your bootloader, please ensure you
have a good disk image that you can boot with.
Now you should also delete the ubuntu subdirectory in the EFI
partition to prevent the UEFI firmware from restoring the entry into
the BootOrder.
To do that, first find your EFI partition. Run sudo fdisk -l to see
the partitions on all attached drives. The EFI partition has EFI
Partition under the Type column.
Suppose your EFI partition was /dev/sda2, then mount it on an empty
folder anywhere.
sudo mkdir /mnt/efipart
sudo mount /dev/sda2 /mnt/efipart
Now we have to find the directory Ubuntu or any other distro's name in
this partition. It is mostly under EFI/distro_name.
Remove that directory and its contents by (PLEASE MAKE SURE YOU ARE
DELETING THE CORRECT DIRECTORY) sudo rm -r ubuntu.