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.
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:
Please help me on this.