I work with Windows 8.1 and today I installed Ubuntu 14.04 alongside it, but now I can't set the boot menu to display both OS. When I boot the system it normally loads Windows 8.1 without opening the boot menu. I created a boot USB with Yumi. When booting with Yumi and selecting "boot from hard disk", Ubuntu turned on. My drives: My laptop is a Fujitsu Lifebook AH532/G52 and the BIOS is a Phoenix v1.10