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Access the BIOS Setup utility.
See Access the BIOS Setup Utility.
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Use the left and right arrow keys to display the IO Menu.
See Navigate BIOS Setup Utility Menus.
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Use the up and down arrow keys to highlight Internal Devices or Add In
Cards, and press Enter.
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Select the Internal Device or Add In Card slot for which you want to
enable or disable the option ROM setting.
The Option ROM window for that device or add-in card slot appears.
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Select Enabled to enable the Option ROM setting, or Disabled to disable
the Option ROM setting.
Note -
Disable the option ROMs for all devices that you do not intend to boot
from.
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Press F10 to save the changes and exit the BIOS Setup utility.
See Exit the BIOS Setup Utility.