I've gotten the solution https://askubuntu.com/a/63613/410771
You should be able to do this via a Live Ubuntu CD.
sudo apt-get install efibootmgr
Then add to the kernel efi support
sudo modprobe efivars
sudo efibootmgr to check your boot entries. It will return something like this:
Timeout: 2 seconds
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)
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
Remove that directory and its contents by (PLEASE MAKE SURE YOU ARE DELETING THE CORRECT DIRECTORY)
sudo rm -r ubuntu.