Whoever solves this Microsoft certificate puzzle, please come forward !!!


suatcini54

suatcini54

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This is my computer with Microsoft CA 2023 certificates.

SB-1.webp

I created a bootable USB flash drive using Microsoft's MCT (media creation tool).

I opted for the default setting "Use recommended options for this computer"

MCT.webp

When USB flash drive was ready, I tried to boot off of it. Mind you, bootable USB flash drive was prepared for this computer..

boot-1.webp

Was my computer able to boot to the bootable USB flash drive created out of MCT ? The answer is a big NO. Was I surprised ? NO.

boot-2.webp

When I checked the certificate of bootx64.efi file, I saw that certificate of this file was Microsoft Windows Production PCA 2011.

bootx64-1.webp

USB flash drive was formatted in FAT32. MCT downloaded Windows 11 25H2 Build 26200.8653 and created the bootable USB flash drive.

If I will not be able to boot to a bootable USB flash drive created with MCT, what am I supposed to do when I need to boot to a USB flash drive ?

Fortunately, my Windows never bluescreens or gets corrupt because I am not a heavy computer user and I never abuse my Windows. I take great care of it.

Does anyone have an idea of what I should have done instead of the above ?

Next time I will try a bootable USB flash drive using famous uupdump.net with updatedbootfiles=1
 

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Update the USB drive using this command.
In this example F: is the drive letter of the USB drive so if needed adjust to whatever the drive letter is of your USB drive.

Code: 
copy C:\Windows\Boot\EFI_EX\bootmgfw_EX.efi F:\EFI\boot\bootx64.efi
 

My Computer My Computer

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Windows 11 Pro
OS
Windows 11 Pro
You can run the check script with the -BootMedia option to check what's on the USB drive.
Or use the update script with -BootMedia.
 

My Computer My Computer

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Windows 7
OS
Windows 7
@KevTech and @garlin Thanks for your prompt responses.

Here are the results:

First check script with bootmedia argument

bootmedia.webp

Now bootx64.efi file replacement:

bootx64.webp

Now I will try to reboot to USB flash drive and advise the results.
 

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    Windows 11 Pro build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-4790
    Motherboard
    Asus H97 Pro Gamer with add-on TPM1.2 module
    Memory
    Teams DDR3-1600 4x4 GB
    Graphics Card(s)
    MSI Nvidia GeForce GTX 1050Ti
    Sound Card
    Realtek ALC1150
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    Dell P2425D
    Screen Resolution
    2560 by 1440 pixels
    Hard Drives
    Corsair NVMe M.2 Core XT 1000 GB (Windows 11 v.25H2); Samsung SATA Evo 870 500 GB (Windows 11 v.25H2);
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    Corsair HX850
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    Gigabyte Solo 210
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    Zalman CNPS7X Tower
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    HP S1000 Plus Wireless
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    Chrome; MS Edge
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    Windows Defender

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And you cam always turn off secure boot when you need to use a bootable USB that you own.
 

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    Windows 11 Pro 25H2 26200.8737AMD Ryzen 7 5825U with Radeon Graphics16GB
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    Windows 11 Pro 25H2 26200.8737
    Computer type
    Laptop
    Manufacturer/Model
    Acemagic LX15PRO
    CPU
    AMD Ryzen 7 5825U with Radeon Graphics
    Motherboard
    BIOS CT_BI_AMI_LX15PRO_AB8139_A-004
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    16GB
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    SSD 2TB
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    30 Mbps
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    System 3

    Acer Swift SF114-34 laptop
    OS Windows 11 Pro 26200.8737
    CPU Pentium Silver N6000
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  • At a glance

    Windows 11 Pro 23H2 22631.2506Atom N450 1.66GHz2GB
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    Windows 11 Pro 23H2 22631.2506
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    HP Mini 210-1090NR PC (bought in late 2009!)
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kelper said:
And you cam always turn off secure boot when you need to use a bootable USB that you own.
Click to expand...
Yes, thanks for the idea. It is always an option at hand. But Microsoft must find ways for us to not go to such extreme measures as disabling Secure Boot.
 

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    Windows 11 Pro build 26200.8524Intel i7-4790Teams DDR3-1600 4x4 GBMSI Nvidia GeForce GTX 1050Ti
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    Windows 11 Pro build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-4790
    Motherboard
    Asus H97 Pro Gamer with add-on TPM1.2 module
    Memory
    Teams DDR3-1600 4x4 GB
    Graphics Card(s)
    MSI Nvidia GeForce GTX 1050Ti
    Sound Card
    Realtek ALC1150
    Monitor(s) Displays
    Dell P2425D
    Screen Resolution
    2560 by 1440 pixels
    Hard Drives
    Corsair NVMe M.2 Core XT 1000 GB (Windows 11 v.25H2); Samsung SATA Evo 870 500 GB (Windows 11 v.25H2);
    PSU
    Corsair HX850
    Case
    Gigabyte Solo 210
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    Zalman CNPS7X Tower
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    Microsoft AIO Wireless (includes touchpad)
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    HP S1000 Plus Wireless
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    500 Mb fiber optic
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    Chrome; MS Edge
    Antivirus
    Windows Defender

  • At a glance

    MacOS 12 MontereyIntel Core i58 GBIntel integrated
    Operating System
    MacOS 12 Monterey
    Computer type
    Laptop
    Manufacturer/Model
    Apple Macbook Air
    CPU
    Intel Core i5
    Memory
    8 GB
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    Intel integrated
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    128 GB
    Keyboard
    Built-in
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    802.11 ac
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    Chrome; Safari
    Antivirus
    N/A
After replacing the bootx64.efi file with the one in \Windows\boot\EFI_EX\bootmgfw_EX.efi file (renamed to bootx64.efi), my computer was able to boot to the bootable USB flash drive.

boot-1.webp

boot-2.webp

boot-3.webp

So this file copying and renaming must be incorporated into the Media Creation Tool by Microsoft. Maybe Microsoft is waiting for the time to come when Windows Production PCA 2011 will be revoked and eliminated for once and for all.

Happy computing.
 

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    Windows 11 Pro build 26200.8524Intel i7-4790Teams DDR3-1600 4x4 GBMSI Nvidia GeForce GTX 1050Ti
    OS
    Windows 11 Pro build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-4790
    Motherboard
    Asus H97 Pro Gamer with add-on TPM1.2 module
    Memory
    Teams DDR3-1600 4x4 GB
    Graphics Card(s)
    MSI Nvidia GeForce GTX 1050Ti
    Sound Card
    Realtek ALC1150
    Monitor(s) Displays
    Dell P2425D
    Screen Resolution
    2560 by 1440 pixels
    Hard Drives
    Corsair NVMe M.2 Core XT 1000 GB (Windows 11 v.25H2); Samsung SATA Evo 870 500 GB (Windows 11 v.25H2);
    PSU
    Corsair HX850
    Case
    Gigabyte Solo 210
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    Zalman CNPS7X Tower
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    Microsoft AIO Wireless (includes touchpad)
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    HP S1000 Plus Wireless
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    500 Mb fiber optic
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    Chrome; MS Edge
    Antivirus
    Windows Defender

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    MacOS 12 MontereyIntel Core i58 GBIntel integrated
    Operating System
    MacOS 12 Monterey
    Computer type
    Laptop
    Manufacturer/Model
    Apple Macbook Air
    CPU
    Intel Core i5
    Memory
    8 GB
    Graphics card(s)
    Intel integrated
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    1440 by 900 pixels
    Hard Drives
    128 GB
    Keyboard
    Built-in
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    N/A
I have no idea how Media Creation Tool determines which of the two boot files (CA 2011 or CA 2023) to pick. You would think it checked the host Windows, and copied CA 2023, since you already have the UEFI CA 2023 installed. 🤷‍♂️

Unlike Rufus which provides an explicit option to use CA 2023 boot files, it's not clear if MCT will catch up and explain which boot file it will be using.

While the products.cab changes every month, we're still using the same MCT tool from October 2025.
 

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Windows 7
OS
Windows 7
I now used Rufus to create bootable USB flash drive. First I tried to use Rufus v4.15_Beta2. This was not able to create the drive. It failed to format the drive.

Then I used Rufus v4.14. This was able to format and create the USB drive with CA2023 and SKUSiPolicy. CA2023 and SKUSiPolicy options came checked by default.

I booted to the flash drive and it booted fine. There were two UEFI OS entries. I chose one.

usb.webp

It booted O.K.

MCT formats the drive in FAT32 and splits the install image (install.esd) in two. But this drive has Secure Boot issue currently.

MCT.webp

Rufus formats the drive in NTFS and uses install.esd as one file. This drive has no Secure Boot issue.

rufus.webp

This may create some boot problems in some systems. My Asus M/B (of late 2014) has no problem booting to NTFS formatted drives.
 

Attachments

  • rufus.webp
    rufus.webp
    44.3 KB · Views: 1

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    Windows 11 Pro build 26200.8524Intel i7-4790Teams DDR3-1600 4x4 GBMSI Nvidia GeForce GTX 1050Ti
    OS
    Windows 11 Pro build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-4790
    Motherboard
    Asus H97 Pro Gamer with add-on TPM1.2 module
    Memory
    Teams DDR3-1600 4x4 GB
    Graphics Card(s)
    MSI Nvidia GeForce GTX 1050Ti
    Sound Card
    Realtek ALC1150
    Monitor(s) Displays
    Dell P2425D
    Screen Resolution
    2560 by 1440 pixels
    Hard Drives
    Corsair NVMe M.2 Core XT 1000 GB (Windows 11 v.25H2); Samsung SATA Evo 870 500 GB (Windows 11 v.25H2);
    PSU
    Corsair HX850
    Case
    Gigabyte Solo 210
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    HP S1000 Plus Wireless
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    500 Mb fiber optic
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    Antivirus
    Windows Defender

  • At a glance

    MacOS 12 MontereyIntel Core i58 GBIntel integrated
    Operating System
    MacOS 12 Monterey
    Computer type
    Laptop
    Manufacturer/Model
    Apple Macbook Air
    CPU
    Intel Core i5
    Memory
    8 GB
    Graphics card(s)
    Intel integrated
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    1440 by 900 pixels
    Hard Drives
    128 GB
    Keyboard
    Built-in
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@suatcini54
looking at your post #4 you have the 2023 certs but you dont have the 2023 DBX files only the 2011 DBX files
it might be worthwhile updating these DBX files to 2023 files

best of luck Steve ..
 

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    Debian 13 KDE .. Windows 11 HomeRyzen 7 5825u64GB DDR4 3200Ryzen 7 5825u
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    HP 24" AiO
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    Ryzen 7 5825u
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    i5 7200u
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    Dell
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    16GB DDR4
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XxXxX said:
you have the 2023 certs but you dont have the 2023 DBX files only the 2011 DBX files
Click to expand...

I don't think you want to place the 2023 in the forbidden list.

Seems to me if you did that your computer would fail to boot since the secure boot forbidden signature database (DBX) prevents UEFI modules from loading.
 

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Windows 11 Pro
OS
Windows 11 Pro
@XxXxX Which CA2023 certificates do you advise me to place under dbx section ? Microsoft UEFI CA2023 and/or Microsoft Option ROM CA2023 ? The first one is for Linux type OS which I do not have and no intention to install later. Option ROM may be needed for bootable devices such as gfx card.
 

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  • At a glance

    Windows 11 Pro build 26200.8524Intel i7-4790Teams DDR3-1600 4x4 GBMSI Nvidia GeForce GTX 1050Ti
    OS
    Windows 11 Pro build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-4790
    Motherboard
    Asus H97 Pro Gamer with add-on TPM1.2 module
    Memory
    Teams DDR3-1600 4x4 GB
    Graphics Card(s)
    MSI Nvidia GeForce GTX 1050Ti
    Sound Card
    Realtek ALC1150
    Monitor(s) Displays
    Dell P2425D
    Screen Resolution
    2560 by 1440 pixels
    Hard Drives
    Corsair NVMe M.2 Core XT 1000 GB (Windows 11 v.25H2); Samsung SATA Evo 870 500 GB (Windows 11 v.25H2);
    PSU
    Corsair HX850
    Case
    Gigabyte Solo 210
    Cooling
    Zalman CNPS7X Tower
    Keyboard
    Microsoft AIO Wireless (includes touchpad)
    Mouse
    HP S1000 Plus Wireless
    Internet Speed
    500 Mb fiber optic
    Browser
    Chrome; MS Edge
    Antivirus
    Windows Defender

  • At a glance

    MacOS 12 MontereyIntel Core i58 GBIntel integrated
    Operating System
    MacOS 12 Monterey
    Computer type
    Laptop
    Manufacturer/Model
    Apple Macbook Air
    CPU
    Intel Core i5
    Memory
    8 GB
    Graphics card(s)
    Intel integrated
    Screen Resolution
    1440 by 900 pixels
    Hard Drives
    128 GB
    Keyboard
    Built-in
    Mouse
    Microsoft Wireless
    Internet Speed
    802.11 ac
    Browser
    Chrome; Safari
    Antivirus
    N/A
suatcini54 said:
After replacing the bootx64.efi file with the one in \Windows\boot\EFI_EX\bootmgfw_EX.efi file (renamed to bootx64.efi), my computer was able to boot to the bootable USB flash drive.

View attachment 175517

View attachment 175518

View attachment 175519

So this file copying and renaming must be incorporated into the Media Creation Tool by Microsoft. Maybe Microsoft is waiting for the time to come when Windows Production PCA 2011 will be revoked and eliminated for once and for all.

Happy computing.
Click to expand...
What he said.
 

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Windows 11 2H25AMD 9900X64 GBAMD 9070 XT
OS
Windows 11 2H25
Computer type
PC/Desktop
Manufacturer/Model
DIY
CPU
AMD 9900X
Motherboard
MSI X870E Carbon
Memory
64 GB
Graphics Card(s)
AMD 9070 XT
Sound Card
built-in
Monitor(s) Displays
Dell 24"
Hard Drives
Sabrent 1 TB NVMe, 4 x SSD (need to check models), 4 x 3.5" HDD, 8-16 TB, all WD
PSU
Seasonic 850
Case
Fractal Design North XL (which I likw)
Cooling
Corsair AIO for CPU, fans for case
Keyboard
Das Keyboard 4
Mouse
Corsair M65 (white)
Internet Speed
1 TB download
Browser
Firefox
Antivirus
Bitdefender
Other Info
Also have Lenovo T14S laptop (me) and Lenovo Slim 71 (wife)
suatcini54 said:
@XxXxX Which CA2023 certificates do you advise me to place under dbx section ? Microsoft UEFI CA2023 and/or Microsoft Option ROM CA2023 ? The first one is for Linux type OS which I do not have and no intention to install later. Option ROM may be needed for bootable devices such as gfx card.
Click to expand...
they should have auto updated when MS updated the 2023 certs.
i believe @garlin has a script to enable these updates.

best of luck Steve ..
 

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System One System Two

  • At a glance

    Debian 13 KDE .. Windows 11 HomeRyzen 7 5825u64GB DDR4 3200Ryzen 7 5825u
    OS
    Debian 13 KDE .. Windows 11 Home
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP 24" AiO
    CPU
    Ryzen 7 5825u
    Motherboard
    HP
    Memory
    64GB DDR4 3200
    Graphics Card(s)
    Ryzen 7 5825u
    Sound Card
    RealTek
    Monitor(s) Displays
    24" HP AiO
    Screen Resolution
    1920 x 1080 @60 Hz
    Hard Drives
    1TB WD Blue SN580 M2 SSD Partitioned.
    2x 1TB USB HDD External Backup/Storage.
    PSU
    90W external power brick
    Case
    24" All in One
    Cooling
    Default Air Cooling
    Keyboard
    HP WiFi UK extended
    Mouse
    HP WiFi 3 Button
    Internet Speed
    1GB full fibre
    Browser
    Edge & Firefox
    Antivirus
    AVG Internet Security/Windows Defender
    Other Info
    Mainly Open Source Software

  • At a glance

    Ubuntu 22.04.5 LTSi5 7200u16GB DDR4Intel
    Operating System
    Ubuntu 22.04.5 LTS
    Computer type
    Laptop
    Manufacturer/Model
    Dell 13" Latitude 2017
    CPU
    i5 7200u
    Motherboard
    Dell
    Memory
    16GB DDR4
    Graphics card(s)
    Intel
    Sound Card
    Intel
    Monitor(s) Displays
    13" Dell Laptop
    Hard Drives
    250GB Crucial 2.5" SSD
    Mouse
    Generic WiFi 3 button
    Internet Speed
    WiFi only
    Browser
    Firefox
    Antivirus
    ClamAV TK
    Other Info
    Mainly Open Source Software
XxXxX said:
they should have auto updated when MS updated the 2023 certs.
i believe @garlin has a script to enable these updates.

best of luck Steve ..
Click to expand...
Thanks for the heads-up. @garlin has all the knowledge and expertise in computer science along with other highly reputable members of this forum community.

I am so glad to have you all here in one place as are many others.
 

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  • At a glance

    Windows 11 Pro build 26200.8524Intel i7-4790Teams DDR3-1600 4x4 GBMSI Nvidia GeForce GTX 1050Ti
    OS
    Windows 11 Pro build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-4790
    Motherboard
    Asus H97 Pro Gamer with add-on TPM1.2 module
    Memory
    Teams DDR3-1600 4x4 GB
    Graphics Card(s)
    MSI Nvidia GeForce GTX 1050Ti
    Sound Card
    Realtek ALC1150
    Monitor(s) Displays
    Dell P2425D
    Screen Resolution
    2560 by 1440 pixels
    Hard Drives
    Corsair NVMe M.2 Core XT 1000 GB (Windows 11 v.25H2); Samsung SATA Evo 870 500 GB (Windows 11 v.25H2);
    PSU
    Corsair HX850
    Case
    Gigabyte Solo 210
    Cooling
    Zalman CNPS7X Tower
    Keyboard
    Microsoft AIO Wireless (includes touchpad)
    Mouse
    HP S1000 Plus Wireless
    Internet Speed
    500 Mb fiber optic
    Browser
    Chrome; MS Edge
    Antivirus
    Windows Defender

  • At a glance

    MacOS 12 MontereyIntel Core i58 GBIntel integrated
    Operating System
    MacOS 12 Monterey
    Computer type
    Laptop
    Manufacturer/Model
    Apple Macbook Air
    CPU
    Intel Core i5
    Memory
    8 GB
    Graphics card(s)
    Intel integrated
    Screen Resolution
    1440 by 900 pixels
    Hard Drives
    128 GB
    Keyboard
    Built-in
    Mouse
    Microsoft Wireless
    Internet Speed
    802.11 ac
    Browser
    Chrome; Safari
    Antivirus
    N/A
suatcini54 said:
After replacing the bootx64.efi file with the one in \Windows\boot\EFI_EX\bootmgfw_EX.efi file (renamed to bootx64.efi), my computer was able to boot to the bootable USB flash drive.
Click to expand...
Thanks for the information. It's another Microsoft do-it-yourself project.
 

My Computer My Computer

At a glance

Windows 11 Pro
OS
Windows 11 Pro
Computer type
Laptop
Manufacturer/Model
Acer TravelMate P215-52
DIY project. That’s clever.
 

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System One System Two

  • At a glance

    Windows 11 Pro build 26200.8524Intel i7-4790Teams DDR3-1600 4x4 GBMSI Nvidia GeForce GTX 1050Ti
    OS
    Windows 11 Pro build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-4790
    Motherboard
    Asus H97 Pro Gamer with add-on TPM1.2 module
    Memory
    Teams DDR3-1600 4x4 GB
    Graphics Card(s)
    MSI Nvidia GeForce GTX 1050Ti
    Sound Card
    Realtek ALC1150
    Monitor(s) Displays
    Dell P2425D
    Screen Resolution
    2560 by 1440 pixels
    Hard Drives
    Corsair NVMe M.2 Core XT 1000 GB (Windows 11 v.25H2); Samsung SATA Evo 870 500 GB (Windows 11 v.25H2);
    PSU
    Corsair HX850
    Case
    Gigabyte Solo 210
    Cooling
    Zalman CNPS7X Tower
    Keyboard
    Microsoft AIO Wireless (includes touchpad)
    Mouse
    HP S1000 Plus Wireless
    Internet Speed
    500 Mb fiber optic
    Browser
    Chrome; MS Edge
    Antivirus
    Windows Defender

  • At a glance

    MacOS 12 MontereyIntel Core i58 GBIntel integrated
    Operating System
    MacOS 12 Monterey
    Computer type
    Laptop
    Manufacturer/Model
    Apple Macbook Air
    CPU
    Intel Core i5
    Memory
    8 GB
    Graphics card(s)
    Intel integrated
    Screen Resolution
    1440 by 900 pixels
    Hard Drives
    128 GB
    Keyboard
    Built-in
    Mouse
    Microsoft Wireless
    Internet Speed
    802.11 ac
    Browser
    Chrome; Safari
    Antivirus
    N/A
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