Hi, my PC has some problems which I described in my previous post and I’m trying to solve by myself. Right now, I’m trying to modify a BIOS NVRAM variable: “SaPegData”, which I think that could be playing an important role in this issue.
However, it is write-protected and I can’t use an EFI/Windows program to change its value, I would need to reflash the whole BIOS in order to do it, but AFUWIN has an option to only flash NVRAM section, so I thinked about extracting my BIOS NVRAM section from a firmware dump and modding SaPegData value using HxD and then replacing it using UEFITool.
UEFITool NE lets you extract NVRAM section (my BIOS has two of these)
But it won’t let you replace, for that you’ll have to use UEFITool 0.28.0.
I extracted both NVRAM regions, modified both of them, and replaced both. This is the result (as you see I just zeroed the antepenultimate position)
BEFORE
AFTER
But when I try to flash my modded image:
What shall I do to solve the “18 - Error: Error: Secure Flash Rom Verify fail” error?
Specs:
-Motherboard: B360H4-EM (Medion)
-Processor: intel i7-9700K
-RAM: 8 GB of Samsung RAM (M378A1K43CB2-CRC)
-Storage: 1 TB SSD +1 TB HDD.
BIOS: 360H4W0X.zip (7.1 MB)