How to disable hibernation and fastboot from windows so dual boot works in Ubuntu 14.04

I have SONY VAIO SVF15319SNB laptop with Windows-10.

I re-partitioned the disk to install Ubuntu 14.04.

Installation was fine but after restarting the system, I am not able to get the dual boot options. System is starting with default Windows.

I tried the 2nd option mentioned in below link: install Boot-repair in Ubuntu.

https://help.ubuntu.com/community/Boot-Repair

It worked fine for first time, but once I re-booted the system and started the windows then again restarting the system, its not showing ubuntu option and starting in Windows.

I have the pastebin while trying to repair using the above mentioned option:

http://paste2.org/hnW6xV2W

Please help me on this.

Boot into Windows, disable hibernation and Fast Boot.
Open command prompt as administrator and execute:

powercfg /h off  

Open the "old" version of Windows Control Panel.
Go to the Power Settings and uncheck Fast startup.
In case it is not visible, enable show hidden settings.

Shutdown the machine completely, do NOT reboot.
Boot into BIOS and select Ubuntu as default system.
Now you can select the OS to boot from GRUB menu.

In the BIOS settings, double check the BIOS Mode is in legacy and not UEFI. This did the trick for me.