Legacy BIOS
This menu configures system UEFI firmware execution environment preferences for supporting legacy OS and legacy Option ROM.
| Item | Options | Description |
| Legacy BIOS |
| Enable/Disable the system UEFI firmware execution environment for supporting legacy OS and legacy Option ROM. Enabled is the default setting. |
| Rehook INT 19h |
| [Enabled] prevents devices from taking control of the boot process. Disabled is the default setting. |
| Non-Onboard PXE |
| Enable/Disable legacy PXE boot for installed network adapters. Enabled is the default setting. |
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