I'm trying to boot from a USB with Fedora ISO on it, but it goes straight to windows 10. I've set the boot order to try the USB first and I'm pretty sure that the files are correct on the USB Files. I used Universal-USB-Installer to put the ISO on the USB, I'm trying to install Fedora 23 and my motherboard is Asus Sabertooth z77.
This is actually an answer because I got it to work by doing this. So, For anyone with an Asus Sabertooth Motherboard, when you turn on your PC spam f2, to get into bios and go to boot menu (f8) and select your device. It should restart instantly and load into Fedora
If USB is set for UEFI make sure your BIOS is set to boot to UEFI. When you select your USB boot device from the boot menu normally it should say UEFI next to it in order for it to work. I've had success setting up a bootable Fedora UEFI device in the past with RUFUS USB on Windows as well as the Gnome Disk Utility.