Asrock X58 SuperComputer anti-spectre microcode and vt-d upgrade

[Ranmamez]

Greetings.
The latest BIOS upgrade for this motherboard is from 2010/11/30, version 3.40, you can find it here http://asrock.pc.cdn.bitgravity.com/BIOS...40)ROM.zip or here ftp://asrock.cn/BIOS/1366/X58%20SuperCom...40)ROM.zip (both instant flash version).
I want to update cpu microcode for spectre protection, also I need to upgrade the vt-d for fixing the compatibility issue with Windows 10 1803 x64 that won't boot if vt-d is on.
I read around (here, latest reply of the first page: https://answers.microsoft.com/en-us/wind...6165636528) that the Asus Sabertooth X58 BIOS 1402 has "Improve VT-d compatibility issue", so I wanted to transfer this fix, since they have the same chipset.
The Asus Sabertooth X58 BIOS 1402 is here: https://dlcdnets.asus.com/pub/ASUS/mb/LG...1533356437
At least let me know how to do that, thank you!

[DeathBringer]

Make and attach TXT-report of CPU-Z.
And post a screenshot of regedit with expanded key HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0

[Ranmamez]

Make and attach TXT-report of CPU-Z.
And post a screenshot of regedit with expanded key HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0

Ok.
Is it ok to get the key from Windows 7 x64? Or should I get it from Windows 10 1803 64bit?

[Ranmamez]

Well, anyway, here they are, got it from Windows 7 x64 sp1

[DeathBringer]

Disable VT-d in BIOS, install Windows 10 1803, update it to actual state (Windows Update).
Make screenshot of winver.exe
Install KB4346084
Make new screenshot of regedit with expanded key HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0
Make screenshot of InSpectre
Enable VT-d in BIOS and try too boot.

[Ranmamez]

That KB says that's impossible to install.
Here the global screenshot.

[DeathBringer]

That KB says that's impossible to install.

Wait for some time and try to run it (multiple times) with administrative rights.

[Ranmamez]

There's no way I can run it with administrative rights.
I even tried to disable UAC (and I mean REALLY disable, with the registry tweak HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System "EnableLUA" set to 0), still to no avail.

[DeathBringer]

Enable VT-d in BIOS and try too boot.

[Ranmamez]

Enable VT-d in BIOS and try too boot.

It doesn't work.

BTW I guess that I can't install that update since my CPU isn't included in the list of that microcode:
https://support.microsoft.com/en-us/help...de-updates
My CPU is Nehalem microarchitecture, core Bloomfield: Intel Core i7 920.
http://www.cpu-world.com/CPUs/Core_i7/In...1920).html

Besides, I guess that it won't fix the vt-d issue even if it was included.

So please help me with my original request, at least to include the vt-d fix into the ASRock motherboard bios.