Some Acer laptops require you to press F1 , then the keys A, R, V, N, S, O in sequence while in the BIOS.
Though rare on standard Rev 3.5 laptops, some gaming variants allow for minor adjustments to: insydeh20 setup utility rev 3.5 advanced options
Power off the device. Hold Fn + Tab , then power it on while continuing to hold the keys. Tap F2 repeatedly to enter the utility with unlocked menus. Some Acer laptops require you to press F1