Acer AR180 F1 Series User Manual page 110

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4 System BIOS
Discard Changes: Select this option and press <Enter> to discard all the
changes and return to the BIOS Setup Utility.
Load Optimal Defaults: To set this feature, select Load Optimal
Defaults from the Exit menu and press <Enter>. Then, select OK to
allow the BIOS to automatically load optimal defaults to the BIOS
settings. The Optimal settings are designed for maximum system
performance, but may not work best for all computer applications.
Load Fail-Safe Defaults: To set this feature, select Load Fail-Safe
Defaults from the Exit menu and press <Enter>. The Fail-Safe settings