I have a new HP Pavilion 15 with windows 8.1, and want to have Ubuntu alongside it. I created an Ubuntu 14.04 liveDVD, disabled fast boot, and changed the boot order. Then I installed Ubuntu. After that the computer still went straight to Windows (when the DVD was not in), so I disabled secure boot (even though some web pages say it's not necessary - can I put it back?). After that I followed all the instructions in Ubuntu 14.04 LTS release doesn't boot after being installed .
After the last step I got this link with tons of info.
All steps here completed without any error message, but still I go straight to Windows.