Solved garlin's PowerShell scripts for updating Secure Boot CA 2023


The source file seems is non existent (or maybe hidden in another partition or something lol)

EDIT: Found the solution, my USB boots perfectly now!

Another Macrium Secure Boot Question

Just joined. I’m still unsure of how Macrium 8.0 free will behave when the new certificate is introduced next June. I have perused this forum and have googled and attempted asking questions utilizing AI. Depending on the wording or time of day, I get different answers. So, my simple question is...
www.elevenforum.com www.elevenforum.com

Leaving it here in case somebody needs it.
 

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garlin said:
Please run the Check_UEFI-CA2023.ps1 script.

Nobody reads the raw byte values from the UEFI variables, because they need to be interpreted as real signing certificates. The script does the correct reporting for yo
Click to expand...

garlin said:
Please run the Check_UEFI-CA2023.ps1 script.

Nobody reads the raw byte values from the UEFI variables, because they need to be interpreted as real signing certificates. The script does the correct reporting for you.
Click to expand...
Thank you Garlin,
I runed the Check_UEFI-CA2023.ps1 script, below is the outcome.
The question is whether I still need to perform the REQUIRED ACTIONS or samething els?
thank you in advance
 

Attachments

  • Check-WindowsUEFICA2023.webp
    Check-WindowsUEFICA2023.webp
    39.6 KB · Views: 4

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Windows 11 Home x64 Build 26200.8894 (25H2)Intel® Core™ i7-4750HQ CPU @ 2.00GHz16 GBNVIDIA GeForce GTX 950M (2 GB); Intel(R) Iris...
OS
Windows 11 Home x64 Build 26200.8894 (25H2)
Computer type
Laptop
Manufacturer/Model
ASUSTeK COMPUTER INC./N751JX
CPU
Intel® Core™ i7-4750HQ CPU @ 2.00GHz
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ASUSTeK Computer INC., BIOS version AMI N751JX.211
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hvoqasimo said:
Thank you Garlin,
I runed the Check_UEFI-CA2023.ps1 script, below is the outcome.
The question is whether I still need to perform the REQUIRED ACTIONS or samething els?
thank you in advance
Click to expand...
Extra checked and the both of are true:
PS C:\Users\asimo> [System.Text.Encoding]::ASCII.GetString((Get-SecureBootUEFI db).bytes) -match 'Windows UEFI CA 2023'
True
PS C:\Users\asimo> Confirm-SecureBootUEFI
True
 

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Windows 11 Home x64 Build 26200.8894 (25H2)Intel® Core™ i7-4750HQ CPU @ 2.00GHz16 GBNVIDIA GeForce GTX 950M (2 GB); Intel(R) Iris...
OS
Windows 11 Home x64 Build 26200.8894 (25H2)
Computer type
Laptop
Manufacturer/Model
ASUSTeK COMPUTER INC./N751JX
CPU
Intel® Core™ i7-4750HQ CPU @ 2.00GHz
Motherboard
ASUSTeK Computer INC., BIOS version AMI N751JX.211
Memory
16 GB
Graphics Card(s)
NVIDIA GeForce GTX 950M (2 GB); Intel(R) Iris(TM) Pro Graphics 5200 (113 MB)
Sound Card
Realtek High Definition Audio
Internet Speed
250 Mbps
Antivirus
Safe Online (F-Secure)
hvoqasimo said:
Extra checked and the both of are true:
PS C:\Users\asimo> [System.Text.Encoding]::ASCII.GetString((Get-SecureBootUEFI db).bytes) -match 'Windows UEFI CA 2023'
True
PS C:\Users\asimo> Confirm-SecureBootUEFI
True
Click to expand...
outcome runing Check_UEFI-CA2023.ps1 script:
powershell -nop -ep bypass -f "C:\temp\SecureBoot-CA-2023-Updates\Check_UEFI-CA2023.ps1”
Secure Boot: ON
Virtualization Based Security: OFF
BitLocker on (C:) OFF

UEFI KEK Certs
--------------
Microsoft Corporation KEK CA 2011
Microsoft Corporation KEK 2K CA 2023

UEFI DB Certs
-------------
Microsoft Corporation UEFI CA 2011
Microsoft Windows Production PCA 2011
Microsoft Option ROM UEFI CA 2023
Microsoft UEFI CA 2023
Windows UEFI CA 2023

UEFI DBX Certs
--------------
Microsoft Windows Production PCA 2011
Windows BootMgr SVN 7.0

EFI Files
---------
Disk 1: Windows Boot Manager [Windows UEFI CA 2023] is ALLOWED.

Registry: WindowsUEFICA2023Capable = 2
[Windows UEFI CA 2023] in UEFI DB, and Windows starting from CA 2023 Boot Manager.

STATUS REPORT
-------------
Registry: UEFICA2023Status = Updated

SUCCESS: NO UPDATES ARE REQUIRED.

PS C:\Users\asimo>
 

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OS
Windows 11 Home x64 Build 26200.8894 (25H2)
Computer type
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Manufacturer/Model
ASUSTeK COMPUTER INC./N751JX
CPU
Intel® Core™ i7-4750HQ CPU @ 2.00GHz
Motherboard
ASUSTeK Computer INC., BIOS version AMI N751JX.211
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16 GB
Graphics Card(s)
NVIDIA GeForce GTX 950M (2 GB); Intel(R) Iris(TM) Pro Graphics 5200 (113 MB)
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FerchogtX said:
The source file seems is non existent (or maybe hidden in another partition or something lol)

EDIT: Found the solution, my USB boots perfectly now!

Another Macrium Secure Boot Question

Just joined. I’m still unsure of how Macrium 8.0 free will behave when the new certificate is introduced next June. I have perused this forum and have googled and attempted asking questions utilizing AI. Depending on the wording or time of day, I get different answers. So, my simple question is...
www.elevenforum.com www.elevenforum.com

Leaving it here in case somebody needs it.
Click to expand...
I mentioned this on an earlier post, the update script needs a fix to account for when both bootfwmg.efi AND bootx64.efi are written to the USB. They're actually the same file in two different places. It depends on the method used to build a bootable USB.
 

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I see Asus has a new BIOS update for my B650E motherboard today. None of the updates have ever said anything about certificates, including this one, and I'm wondering if applying it could have any effect on the update Microsoft pushed to me this week. The details of that are in this post, and does anyone have comments on my "REQUIRED_ACTIONs" question?

https://www.elevenforum.com/t/garli...pdating-secure-boot-ca-2023.43423/post-708496
 

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The key to a successful CA 2023 update is getting the KEK CA 2023 installed. Without the KEK, the other CA 2023's aren't validated.

Two methods can work:
1. A new BIOS firmware with CA 2023 certs built-in. This is the best solution for users since it can restore them after a factory reset.

2. OEM signs the KEK CA 2023 with their PK, and submits it to MS. This is the second best solution, because MS can match your PK's thumbprint and push a specific KEK CA 2023 (because they're uniquely signed by someone's PK). If you factory reset this BIOS, the KEK CA 2023 disappears. But you (or MS) can easily restore it because it's sitting in MS's hands.

Windows Update probably pushed the KEK to you, based on your BIOS's PK.

In your specific case, the pending actions are to perform the CA 2011 revoke. Which you can do now, or wait until MS gets there (later this year).
 

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garlin
I am using an old Dell Optiplex 3020 secure boot enabled.

3 months ago, I updated the Ca2023 certificate manually by selecting custom keys using bios .

Here are my system results.
2026-02-13_235523.webp
 

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I guess the only way to find out if Asus added the CA2023 certs to their BIOS is to try it and see. It would kind of suck for them to release a new BIOS that doesn't include them if they had to sign the KEK CA 2023 cert for Microsoft to have pushed it to me.
 

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nkptext said:
garlin
I am using an old Dell Optiplex 3020 secure boot enabled.

3 months ago, I updated the Ca2023 certificate manually by selecting custom keys using bios .
Click to expand...
Can you try running my check script? The ZIP file for both the check and update scripts are in post #1.

This thread (unlike the other 5-6 Secure Boot threads) is dedicated for questions about my scripts. I do think my script helps explain your PC's situation in a more understandable format, which also better helps you at the same time. IMO the other scripts out there are confusing to read.

Unfortunately, there's a lot of scripts floating out there. And some of them add a lot of noise to the discussion. Share your results, and I'll walk you through your situation. Thanks!
 

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I guess you get the same results by running the bat files as admin as you would running the ps1 files?
No matter what I try I can not get the ps1 files to run
 

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barreleye said:
I guess the only way to find out if Asus added the CA2023 certs to their BIOS is to try it and see. It would kind of suck for them to release a new BIOS that doesn't include them if they had to sign the KEK CA 2023 cert for Microsoft to have pushed it to me.
Click to expand...
Yes it would suck. But look at it from at ASUS's perspective:

1. To provide you a new firmware with built-in CA 2023 certs requires them to do the KEK signing process. But releasing a new firmware is a can of worms. People are going to complain well if you bothered to release new code, why didn't you fix known [XYZ] BIOS bug that's been there for years.

2. Providing just the signed KEK to MS is the lesser of two evils for the OEM. Functionally it gets the Secure Boot process done without having the risk of releasing a whole new BIOS. And the QA effort in testing the BIOS, if they're not going to fake testing.

If they have too many old BIOS'es right on the edge of support, only signing the KEK allows them to keep more models going.
 

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man00 said:
I guess you get the same results by running the bat files as admin as you would running the ps1 files?
No matter what I try I can not get the ps1 files to run
Click to expand...
They should, all the batch file does is call the PS scripts using a temporary execution policy bypass on scripts.
 

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garlin said:
Can you try running my check script? The ZIP file for both the check and update scripts are in post #1.

This thread (unlike the other 5-6 Secure Boot threads) is dedicated for questions about my scripts. I do think my script helps explain your PC's situation in a more understandable format, which also better helps you at the same time. IMO the other scripts out there are confusing to read.

Unfortunately, there's a lot of scripts floating out there. And some of them add a lot of noise to the discussion. Share your results, and I'll walk you through your situation. Thanks!
Click to expand...
14-02-2026.webp
After that, I rebuilt all the certs using the latest Mosby installer.
After that, all is OK, but the ISO booting problem with ca2023
Like
Macrium, Hasleo Backup Suite, easyuefi
iso booting error image
2026-02-14_035710.webp
 
Last edited:

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nkptext said:
View attachment 163226
After that, I rebuilt all the certs using the latest Mosby installer.
After that, all is OK, but the ISO booting problem with ca2023
Like
Macrium, Hasleo Backup Suite, easyuefi
iso booting error image
View attachment 163230
Click to expand...
When I run this command and reboot:

powershell -nop -ep bypass -f C:\Temp\Update_UEFI-CA2023.ps1 -SkuSiPolicy

...this is what happens when I reboot to a USB 25H2 installer stick which booted up fine minutes before doing the above command:


This same thing happened a couple days ago. This was a test to confirm what triggered it.
Secure Boot.webp
 

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If you're having EFI load errors, you can try removing the SkuSiPolicy file:
Code: 
mountvol S: /s
del S:\EFI\Microsoft\Boot\SkuSiPolicy.p7b
mountvol S: /d

The SkuSiPolicy file adds restrictions on what files are permitted to execute. It may be this version of the SkuSiPolicy no longer matches the current winload.efi. One problem is the SkuSiPolicy is sort of a "black box", you can't (easily) decipher what are the restrictions.

In the early days before MS decided on its long-term Secure Boot solution, the SkuSiPolicy was released as a quick workaround for blocking unwanted boot files. It might be causing a boot conflict right now. In any event, you can always re-rerun the update script or copy it back to EFI partition.

UPDATED: After some investigation, all the SkuSiPolicy does is duplicate the eventual Secure Boot controls at the Windows execution level. It contains two certs (PCA 2011 and MS Root Authority 2010). So it's just the same net result as banning CA 2011 in the DBX.
 
Last edited:

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Try this:
1. Run diskpart, do "list volume".
2. "select vol [N]" where [N] is the number of the Recovery partition
3. "assign letter=R"
4. exit diskpart

5. From Explorer, enter "R:\Windows\System32" in the folder path.
6. Scroll down to winload.efi
7. Open Properties -> Digital Signatures. Open the cert and view it. Does it say PCA 2011 or CA 2023?
 

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garlin said:
If you're having EFI load errors, you can try removing the SkuSiPolicy file:
Code: 
mountvol S: /s
del S:\EFI\Microsoft\Boot\SkuSiPolicy.p7b
mountvol S: /d

The SkuSiPolicy file adds restrictions on what files are permitted to execute. It may be this version of the SkuSiPolicy no longer matches the current winload.efi. One problem is the SkuSiPolicy is sort of a "black box", you can't (easily) decipher what are the restrictions.

In the early days before MS decided on its long-term Secure Boot solution, the SkuSiPolicy was released as a quick workaround for blocking unwanted boot files. It might be causing a boot conflict right now. In any event, you can always re-rerun the update script or copy it back to EFI partition.

UPDATED: After some investigation, all the SkuSiPolicy does is duplicate the eventual Secure Boot controls at the Windows execution level. It contains two certs (PCA 2011 and MS Root Authority 2010). So it's just the same net result as banning CA 2011 in the DBX.
Click to expand...
Thanks @garlin for the explanation and tips, I found it interesting and very helpful. I have restored to my backup, so I'll have to leave the testing for some other time.

Ps. Where did you learn all this stuff?
 

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