Security boot fail

After writing the Qubes ISO in DD mode to my USB on Rufus, following all the steps etc. I selected USB boot on the BIOS menu and then it says “Security boot failed”.
Can this be because in Rufus, the only option under target system was UEFI? It did not list another option.
Acer Aspire 5 15
Thanks

Ok thanks. So how can I make it so BIOS is an option for target system? This was one of the computers that was listed under Qubes supported hardware and it said that everything was fine to run Qubes.

Disable Secure Boot in BIOS:

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Thank you!