Hi!
Sorry if my English is not the best, I am using Google Translate.

I have an MSI CX41. That I previously made modified BIOS to unlock all options, they worked perfectly. The detail is that all these modified BIOS were made with a previous version (402 according to the MSI page) which was Legacy BIOS

I was curious to install Stock UEFI BIOS (50J) and was able to upgrade from Legacy to UEFI amazingly, but with the 50J I cannot upgrade the modified BIOS based on it. It always throws the error "18 - Error: Secure Flash Rom Verify Fail". (Image attached to publication)

It should be noted that if I try to flash the Stock 50J BIOS if I can do it without problems, likewise the Stock 60H BIOS of the MSI CR41 (Same computer, but without dedicated GPU) I can flash it without problems. But when trying to flash some modification of the 50J or 60H they all throw the same error.

Also, I cannot downgrade to 402 as I get the error: "1e - Error: Secure Flash feature does not support this file."

All this I am doing from AFUWIN with the option "Program all the blocks" and "Do not check Rom ID". (Image attached to Post) I have not tried AFUDOS or AFUEFI because I do not know how to use them, I have tried it before but I do not get any results.

Any solution to this? Thanks in advance

Expected...read it here

@RyuDragon2017 - What kind of CPU does this use, AMD or Intel? MSI Spec page does not load
I think from Google search it looks like Intel. Best way to do this would be via FPT, dump the BIOS region, disable any locks stopping you from flashing back mod BIOS, then flash back mod BIOS region via FPT
Do not use AFU DOS, referring to old one w/ GAN option, unless you have flash programmer, backup made with that and it's confirmed by someone to be OK, so you are ready to recover if bricked. Same, do not use AFU anything, with /RECOVERY or /CAPSULE

Do this, link me to your correct BIOS download page (not the BIOS), and send me file from step #1, and tell me what error you get at step #2 (Do nothing here, with your modified stock BIOS, and do not use anything stock with FPT)

Hello @Lost_N_BIOS Thanks for your answer!!

Yes, it is an Intel, HM76 chipset. The MSI CX41 info page has been down for months. Sorry not to show more information

I didn't quite understand the AFUDOS part... as I said, I don't know how to manipulate it. I have only used AFUWIN

The direct download link for my exact BIOS is: https://download.msi.com/bos_exe/nb/w8_E1485IMS50J.zip
You can get it at this link: https://www.msi.com/Laptop/support/CX41#down-bios alongside version 402 Legacy.

I fixed the ME FW just yesterday thanks to "plutomaniac" in this post: Intel ME FW: N/A After BIOS reprogramming. So I will manipulate the MEI a bit. Anyway

The file you asked me from step one: https://drive.google.com/file/d/14wjdCHD...iew?usp=sharing

PD: Excuse me if my english is broken :C

EDIT: I hadn't realized that biosreg.bin had to be obtained with the 32-bit FPT. I did it with the x64

I just edited the download link of the biosreg.bin in a .zip obtained with the 32-bit FPT. I also had no errors doing step two

Oh, excuse... I forgoted.
Flashing the biosreg.bin again i don't have any error

Intel (R) Flash Programming Tool. Version:  8.1.60.1561
Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.
 
Platform: Intel(R) HM76 Express Chipset
Reading HSFSTS register... Flash Descriptor: Valid
 
    --- Flash Devices Found ---
    EN25Q64    ID:0x1C3017    Size: 8192KB (65536Kb)
 
PDR Region does not exist.
GBE Region does not exist.
 
- Reading Flash [0x800000] 3072KB of 3072KB - 100% complete.
- Verifying Flash [0x800000] 3072KB of 3072KB - 100% complete.
RESULT: The data is identical.
 
FPT Operation Passed
 

@Lost_N_BIOS What happens if I edit biosreg.bin with AMIBCP? He reads it perfectly.

Let me explain, I just unlock some BIOS options. Nothing else, not that I can do too much with an old MSI laptop model... So I just want to change Access/Usage from "Default" to "USER" so I can manipulate it.

Is it possible to edit the biosreg.bin with AMIBCP and then flash using FPT?

I did the modifications of the biosreg.bin in the AMIBCP, I did the command in the FPT and it flashed without problems. I already have the unlocked options I wanted. Thank you!

Now I want to do something else, but I will do another post so as not to saturate this one.