I installed elementary OS Freya via USB alongside Windows 8. It finishes so I reboot.
The screen goes black, then automatically boots as Windows 8.
I searched on the internet a bit, then found out that I hadn't turned off Fast Boot. I tried changing boot order but to no avail.
When I go on the Advanced Settings, the option above troubleshooting, the things that show up are Normal Boot, GRUB and my USB.
GRUB didn't do anything I understood so I decided to try installing elementary OS again.
I chose to install alongside Windows and was given the option of partitioning.
But, it didn't show Windows 8 - just two elementary OS installs.