Hi
Welcome to the Microsoft community.
Different models, even those provided by the same manufacturer, may have differences in the BIOS. Therefore, if you want to make any changes to the BIOS, it’s best to contact the technical support of the manufacturer to assist you in finding and changing the relevant BIOS settings. Regarding the boot issue, please enter the BIOS to check whether your main hard drive is in the boot items. It’s possible that the EFI boot disk has been written to your USB drive.
Best regards
Tommy Jin | Microsoft Community Support Specialist