I think you can find the setup header by searching for 'Bios Lock' in UEFItool, double clicking the result and then extracting that entire setup header into a bin file then run universal IFR extractor on that bin file and extract it to a text file, where you can get the hex offset for Bios Lock. Basically: dump your APTIO bios capsule with FPTw64 -d biosname.rom -bios Run UEFItool on it and extract the main setup header. A few guides have been posted on the MSI section. You'll have to do some searching yourself. There are several EFI shells you can boot to that allow you to change the status of 'Bios Lock' to disabled by using a setupvar command (the hex code offset for Bios Lock must be known, and can be found by looking at the txt file created in IFR extractor). If that doesn't work, disable secure boot and then do a search on how to use UEFItool, universal IFR extractor, to find the 'Bios Lock' variable command, and then disable it by booting to an EFI prompt.
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