Question My BIOS wont let me dual boot

Apr 5, 2019
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I own an Acer Predator Helios 300 series laptop, I am trying to dual boot Elementary OS on pre allocated space on my hard drive...
I used Rufus to make a bootable USB with the downloaded linux ISO but when I try to boot in the BIOS the USB doesnt show up and it gives me this:

PXE-MOF: Exiting PXE ROM.
error: unknown filesystem.
Entering rescue mode...
grub rescue>