many people are having concerns about the secure boot requirement of battlefield 6, so here is a quick guide to set up your motherboard for bf6 beta. some of older motherboards do not have that function, but there is a fast and easy way to force it :
>Boot into UEFI (f10 during boot)

>Find USB Configuration (under Advanced or Peripherals)

Disable:

>Legacy USB Support

>USB 3.0/2.0 Controllers

>XHCI Hand-off

>Save and reboot

now press f10 and reenable those options, reboot and you should be able to launch the bf6 preload again