I recently installed kubuntu 14.04 on my machine that had windows 8.1 pre-installed.However, after restarting the system the grub menu does not show windows 8 option.

I've already tried updating the grub by using sudo update-grub2 but nothing happens.

I've also tried the boot-repair option and I got this URL: http://paste.ubuntu.com/9693911

Now,How do I proceed to get the windows 8 option on the grub menu ?


I also tried putting a windows 8 entry in the /etc/grub.d/40_custom file:

menuentry "Windows 8" {
    set root='(hd0,gpt1)'
    chainloader /EFI/microsoft/BOOT/bootmgfw.efi

and after selecting the Windows 8 option I get an error:

file path: /*************some path type structure********************/
error: cannot load image

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