I'd like to share a BIOS unlock method for NH55 Insyde BIOS. I got it from a chinese blogger from bilibili, don't know who actually made it. Tested with latest BIOS (1.07.08). You need format a FAT EFI partition on USB storage device to store the unpacked files and folders. Then, disable SecureBoot from BIOS menu (you must disable Secure Boot even if you can sign it with your own DB key, otherwise it will always stay at boot entry selection menu) and select the USB storage device entry on boot entry selection menu. After some seconds, you'll enter SetupUtility and see all hiden items. It'll not unlock the menu permanently since it works by modifing BIOS code loaded to RAM. If you want to enter the menu next time, you just boot the made device entry again.
NH5xJN_BIOS_Unlock.7z
