I have a new computer that came with windows 8.1.
I installed ubuntu 15.04 on another partition, so that I had the choice to boot from either windows or ubuntu when the computer starts up. But there was a hardware failure in my computer, which means I had to send it in where I bought it. They fixed the hardware failure. But now when I start my computer, it only boots in windows, not giving me the chance to boot from ubunty. At first, I thought they deleted ubuntu, but when I wanted to install ubuntu again from usb, I can see that my ubuntu 15.04 is still there with all its data.
How do I make it so that I can choose to boot from windows and ubuntu again?
I am fairly new to linux
Thanks