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If 'Secure Boot State' is disabled, move to step 13ġ2. If 'Secure Boot State' is enabled Change OS type to 'Other OS' and enter 'Key Management' In secure Boot section, note the 'Secure Boot State' and OS Type, desired state is disabled. Go to “Boot” section, then into “Secure Boot” sectionġ0. Boot to BIOS, once inside hit F7 to get text based GUI. Now, lets head to BIOS to disable secure boot - Disable secure boot via one of the links below, or follow my images as we go alongĩ. Get copy of FPTw that comes from a Intel System Tool package that matches your current ME version and place that along with your modified BIOS in same folder on your desktop, ie put modbios.bin into same folder as FPTw.exe and it’s included system files.įor this instance FPTw is included attached below with boot64.efi file and he Universal IFR ExtractorĨ. Rename boot64.efi file to Shell.efi now, and place it in the root your USB stick, ie - not in any folders, and leave this connected to USB Port until removing later when instructedħ. This particular info is for BIOS 3401, in latest BIOS 3805 VerOffset/VarName is 0x8A7Ħ. Write this VarOffset/VarName down (0x8A6) on paper to have in front of you physically, you will use it later to change the default value of 0x1 = enabled to 0x0 = disabled In BIOS Lock string line, locate the VarOffset/VarName and note it’s default setting (0x1).

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Open IFR Extractor output text file, and search for 'BIOS Lock' in this instance, other locks mentioned above can also be search during when other similar mod BIOS flashing issues occur with FPT. Wait a few seconds, then hit extract and save txt file with similar name so you know what module you obtained the IFR from, usually this will be auto-named for you but not always.Ĥ. 'Protocol' will show Green UEFI, this means IFR can be extracted from this module. Open Universal IFR Extractor and browse to the module you extracted above. This is the file we will use in next step with IFR Extractor to find Setup_Var needed to disable locksģ. To know which it is easily you can search using UEFITool “Unicode” for BIOS Lock Name file per GUID Or PE32 Or SubGUID-asis, so you will know your extracted location and method, good habit to get in for other usage later. Normally you will be extracting the PE32 module as shown in the image, not the entire GUID, but sometimes BIOS lock or other lock also located in a Setup SubGUID ending with a bunch of 0000000’s. Find setup module (in this instance this is GUID - 899407D7-99FE-43D8-9A21-79EC328CAC21 - find via search/GUID tab, copy/paste GUID if taking value from one program to the other), right click and the GUID and extract as-is. This way it’s easier to find setup using NE Alpha and then copy GUID to 0.25 version, or you can extract directly using NE Alpha, showing both methods here for better user understanding.Ģ. Both version are used in this instance due to this particular Asus BIOS the modules are not all properly labeled. Open BIOS in UEFITool and UEFITool NE Alpha side by side. LAN MAC ID is usually stored in GbE region of BIOS, which we don’t flash, but when it not it’s within the BIOS region so this will save it.ġ.

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This way you do not loose your Serial #, UUID, DTS Key etc. Then, take a backup of the BIOS region using FPT (FPTw -bios -d backup.bin), and to this apply any and all edits you need to make, this will be the file we reflash. * Before getting started on this, it’s best to flash the new stock version of the BIOS you intend to flash modified version of, do that using normal Asus method (ie EZ Flash)

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Hex editor of your choice - Here’s a good free one HxD, I use paid version of Hex Editor Neo, I’m unsure how good the free one isĮFI Shell boot64.efi file - attached below, rename to Shell.efi for this specific Asus board, BIOS tells you in hover/hint on “Launch EFI Shell” what file name it expects.

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UEFITool 0.25.0 - Download in first spoiler

Tools used, will be linked here or attached below

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I will show how to get the variable ID here also initially, in case this changes in the future for this model, and so that others in the future that find this will also be able to check and find the locks on whatever board BIOS they look into fixing. This is due to “BIOS Lock” bit set in the BIOS itself, and this method can be applied to other BIOS HSFS register type locks such as SMI/SMM Lock (error 280), GPIO Lock, BIOS Interface Lock Goal of this guide is specifically to change 'Setup Variable' from BIOS setup module - (VarOffset/VarName): 0x8A6, VarStore: 0x1 (Change to 0x0) How to fix this specific Intel FPT Error 368 Write Protection BIOS region issue with Modified Asus BIOS, and other related locks