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unable to unlock advanced settings of bios in haeir y11b laptop

I have Haier y11b laptop. it has two drives. one drive capacity is 30gb which has windows installed. the other drive capacity is 465gb. as the 30gb drive capacity is too low for other software to be installed in this drive. i somehow installed windows in second drive using wintousb(third party software). but the problem is that the second drive is not appearing in bios settings. I need to unlock advanced settings in bios for that I don’t know the exact keys. Please let me know how to unlock its advanced settings. Aptio American Megatrends is installed.