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I have a sony vaio laptop, bought around june 2012 with Windows 7 pre-installed. My BIOS is a InsydeH20 rev 3.7.

I'm using Ubuntu alone for a long time now, I would like to install a dual-boot with Windows 8.1 alongside Ubuntu 14.04 LTS.

First, I made a backup of all my files and formatted my hard drive. I turned on the UEFI option in my BIOS and I changed the partition table from MBR to GPT. Then, I installed Windows 8, I let it made all the partition it wanted. I upgraded it to Windows 8.1, then I turned off the fast boot option.

I installed Ubuntu on another partition and I created a last partition to share files between Windows and Ubuntu.

When I rebooted, I couldn't see Grub. It loaded right into Windows.. So I used boot-repair from my Ubuntu LiveUSB but that didn't change anything !

Here is the link from boot-repair : http://paste.ubuntu.com/8008454/

So I would like to have Grub when my computer boots.

Also, I cannot turn off the secure boot option. There is no such thing in my BIOS and I can't see the UEFI setting in Windows. I mean when I'm here there is no UEFI firmware settings.

Hope this is well explained, let me know if you need more informations, Antoine

Antoine
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  • This question may help - [Installing Ubuntu on a Pre-Installed Windows 8 (64-bit) System (UEFI Supported)](http://askubuntu.com/questions/221835/installing-ubuntu-on-a-pre-installed-windows-8-64-bit-system-uefi-supported). – Wilf Aug 10 '14 at 18:51
  • Thank you for your answer, I've read it all but I'm still stuck. I might have done something wrong, I will keep looking for a solution. – Antoine Aug 10 '14 at 23:00

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I used the link bellow and had complete success, including Grub options on every boot:

Guide To Install Ubuntu 14.04 In Dual Boot Mode With Windows 8 Or 8.1 UEFI

Hope it helps!

jglerner
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  • Thanks for you answer, I've read this guide but it doesn't seem to work. I'll keep looking for a solution. – Antoine Aug 10 '14 at 22:59