Unable to boot into Linux from USB

[pineapple1001]

Hi, I have a problem with booting from a USB flash drive.
I have set priority in BIOS to USB and of course put an image of Linux distributive on my flash drive, but it just boots into WIndows!
What can I do?

 

[Saga Lout]

One possibility is the BIOS also needs a settings change if there's an entry for USB Legacy Support. That allows power to the ports before the operating system cuts in.

Does the USB drive work in another machine? It could be a flaw in the ISO making it non-bootable.

 

[pineapple1001]

I tried several ISO's with different imaging tools, no effect.
Now BIOS is configured to UEFA settings. So I shall change that to Legacy?

 

[Saga Lout]

Worth a shot.