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My bootloader is gone

Anonymous
2023-09-15T00:32:24+00:00

I think it could be my fault but maybe someone could help me to recover it.

When I did this install on my fresh M2 I had an old SSD installed with my old w11. After the install the old SSD (with the old install) was not visible form file explorer but it was on bios. Today I formatted that old SSD and my new w11 on the M2 (still visible on the bios, but not bootable) all the files seems to be ok, I checked from EFI shell.

Now the main question is, my new w11 was still using the bootloader on the old SSD?

Windows installer seen the old bootloader and avoided to install a new one on the new M2?

Now that I have formatted the old SSD how can I get my bootloader back without clean install the system?

Windows for home | Windows 11 | Recovery and backup

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  1. Ramesh 176.2K Reputation points Volunteer Moderator
    2023-09-15T10:44:10+00:00

    Please run these commands:

    • diskpart
    • select volume G
    • shrink desired=250
    • create partition efi

    If you get the output "Diskpart succeeded in creating the specified partition" for the above command, run these commands:

    • format fs=fat32 label=EFI quick
    • assign letter=Y
    • exit
    • bcdboot G:\Windows /s Y: /f UEFI

    Post screenshot(s).

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  1. Anonymous
    2023-09-15T08:53:30+00:00

    Ok, I have done all the commands. (sorry for the glare but i dont have a better way to capture the screen).
    My new M2 is 1tb, my old ssd is 250gb. I have other 3 disks installed 1tb, 1tb, 2tb which i use for data storage only.

    • bcdedit /enum osloader
    • List disk
    • Now I dont know if my m2 is 0 or 4 (both 1tb, bot with primary/reserved partitions while disk 2 (MBR) has only primary)
    • List part disk 3 (old ssd)
    • List vol (I've checked my desired system volume is G)

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  2. Ramesh 176.2K Reputation points Volunteer Moderator
    2023-09-15T07:06:20+00:00

    If you can't access WinRE, boot from the Windows 11 USB setup disk and access WinRE.

    To create a setup disk, see Create installation media for Windows - Microsoft Support.

    Boot from the setup disk. When you see the setup screen, press Shift + F10 to open Command Prompt.

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  3. Anonymous
    2023-09-15T07:02:29+00:00

    I can't boot anything.

    There is a sort of recovery from USB?

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  4. Ramesh 176.2K Reputation points Volunteer Moderator
    2023-09-15T03:36:00+00:00

    If you're able to start Windows, please open Disk Management and maximize it. Take a screenshot and post it here.

    Also, from WinRE Command Prompt, run these commands:

    • bcdedit /enum osloader
    • diskpart
    • list disk
    • select disk 0
    • list part
    • select disk 1
    • list part
    • list vol

    Post the output of each command here.

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