In the BIOS, look for the Secure Boot setting, and if possible, set it to Disabled. This option is usually in either the Security tab, the Boot tab, or the Authentication tab.
Look for a setting called "Boot Mode", "UEFI Boot", "Launch CSM" or whatever else it may be called, change the boot mode from UEFI to Legacy/CSM: disable the UEFI Boot option and enable CSM Boot support.
Note that the Compatibility Support Module (CSM) may not be present on all UEFI PCs. On some UEFI PCs, it supports UEFI only, without an option to enable CSM/Legacy support.
(summary of this: https://www.top-password.com/knowledge/disable-UEFI-enable-legacy-support.html)