Thanks @Fernando! I thought you already added a link to it when you mentioned combining with the IFR Extractor AMISetupWriter, but obviously that's it's own thread / similar to this one and not what I was thinking when rotoyouoio mentioned adding this as a link.

I believe what @rotoyouoio meant was a link to this method should be added in the Asus and/or general section of this thread - [Guide] How to flash a modded AMI UEFI BIOS
I wrote the guide about Asus in general due to that was the board/BIOS needed at the time, however, the method applies to any/all/most UEFI BIOS. That method can be used to disable BIOS Lock, SMI/SMM lock, GPIO, BIOS Interface etc.

Sweet, thanks @Fernando, I guess we both missed it!! It's there already @rotoyouoio

Hello, I'm having the same error trying to flash a moded rom on an Intel's Insyde BIOS can this method work on my motherboard?

@cuongvfc - What is the actual motherboard? And what is the stock flashing tool included in the download? If it's an EXE and you are not sure, link me to the exe.
In general though, the answer will probably be no, you may need to get a flash programmer (Like CH341A) and SOIC8 test clip cable if it's a soldered on BIOS.
If it's "Intel" branded motherboard, you must get the programmer and cable, dump the BIOS and then modify that and program it back, that's the only way for Intel
Unless you can pinmod the board to unlock the FD, dump the entire BIOS with FPT, then mod that and unlock the FD, then write it back with FPT. I
Pinmod method is here in section E - [Guide] Unlock Intel Flash Descriptor Read/Write Access Permissions for SPI Servicing
See also the info about jumpers, if you have a "Service mode or ME/FD" etc jumper then you may be able to dump BIOS like that too.

this is my BIOS link https://www.dell.com/support/home/us/en/...-15-5570-laptop
so there is no way to mod the bios without involve touching some hardware ?

I will check it for you, since it's Dell not Intel, you may be able to flash through some non-Dell/OEM method (Like AFU or Intel FPT)
Please Download this V11 Intel System Tools package - https://mega.nz/#!OM9hGaab!W6NFxLZl5fQjr...0mYs4r9etKn_dys

In Flash Programming Tools folder, go to the win32 folder and select that folder, then hold shift and press right click, select open command window here.
Then run following command, if error show me image of the error where I can see your typed input command and the error all in same image
FPTw -bios -d biosregdump.bin

If you get error 368, or similar, do the steps in this guide on page one, starting at step #6, here is your "BIOS Lock" variable from steps 1-5 >> 0x8A6
So at grub prompt you will enter >> setup_var 0x8A6 0x0
Once you change that in grub, do the above FPT command again, if you get new error please show image.
If you get no error now, you can then modify that file, and reflash using this command >> FPTw -bios -f biosregdump.bin

well actually I get Dump from FPT moded it and get error 368, I'm here because I don't know what my BIOS LOCK variable is. I'll try step #6 now

OK, thanks, I gave you BIOS Lock variable above (Here's what you type at grub >> setup_var 0x8A6 0x0), so follow guide as then rest as I mentioned above.

I got the same error after changed the variable to 0x0 I also tried to flash the "biosregdump.bin" from fpt -bios -d but get the same error

This is not possible if grub stuff goes OK, you are missing something, or getting something in steps wrong. Please show me image of you in grub before and after you type the command out.
If there is yellow text in grub, this is wrong EFI Shell, use method and manner with files, outlined in guide
Also, are you doing step #16 after entering grub commands? >> 16. Hit Control+ALT+Del to reboot, let windows load.

oh this is not the EFI shell you linked in this post I got it somewhere else, so should I download EFI shell from this post and try again?
here the picture
and do you sure variable on my bios is 0x8A6 ?
I did ctrl+alt+del and let it reboot to window

Thanks, it's OK, that is correct grub. Looks unlocked now too, 0x00. exit out of there and try FPT again, if still no luck, yes go ahead and try with the file in this guide, in case it's updated or different version of grub

While we're wrestling this, check the board over and make sure you aren't missing any two-pin jumpers you could enable, usually labeled FD, FDO, ME, Service, something like that. If you find, put jumper on and try again.

Also try Setup_var 0x0 0x0
Maybe error for that, but it's adding default ID (0x0) for the variable too.

* edit @cuongvfc - Please download this package, run only the read commands for 32 and 64 (Nothing from text file "After edit", don't run those commands, only two at top). Maybe you have lock also enabled in NVRAM, if so we can disable from here if you can get output
Run this from within each version folder and upload any NVRAM.txt files it outputs
https://www.sendspace.com/file/19pj47

Also, go ahead and test a full power down reboot, boot back to grun and type setup_var with the ID only (no 0x0 following ID) and see if it says 0x0, if yes then exit to windows and try FPT again

And, one final thing to test, put the system to sleep (S3), wait a few minutes, wake it up and then try FPT command again.

I tried on every version, I already run cmd by admin, error 4 give me nvram.txt with basically nothing inside, other than that is
"Checking Driver "amifldrv" ...:
Old driver v3.1 found - get version 2.00 or above."
or
AMISCE is not supported on this system.
and error 1 in ver 5.03.111 even know I'm open it with administrator
Here is what showed in CMD window