How can I manually create a boot partition for an MBR disk?

Thanks for your feedback. Please, use the following steps:

First, boot the computer using Windows Installation media. In the setup screen, press Shift and F10 keys together, then the command prompt window will be shown.

In the command prompt, type diskpart.

Select the disk when you create the EFI partition

Select the EFI partition and execute:

format quick fs=fat32 label="System"

create partition msr size = 128

After that, type Exit to close the diskpart console. Now type the following commands:

bootrec /fixboot

bcdboot c:\Windows /s b: /f all

Next, reboot your computer.

I want to create that boot partition on an MBR disk to install Windows 11. I can't create an efi on MBR.

You can't create a UEFI partition on an MBR configured drive. It needs to be GPT.

You could try using the MBR2GPT utility available on your system to convert the drive to GPT and UEFI..

Hi Sushruth, my name is Jose, a Windows user like you. I'll be glad to help you today.

The procedure is incomplete. After the partition creation, it is empty. You must add content to it using the following command:

bcdboot C:/windows

If your Windows partition has assigned another letter than C, please replace it in the command.

Please let me know if you need any further assistance.

Why you want to manually create the EFI partition to install Windows 11?