NEW SSD installation

Hi

Your BIOS is probably pointing to the old (removed) device.

So a good internet search offers ....................

 Check basics first

With only the cloned disk connected (if possible):

• Enter BIOS/UEFI and set the cloned disk as first boot device.​

• Match boot mode to partition style:

  • If the disk is GPT, use pure UEFI (no Legacy/CSM).

  • If the disk is MBR, use Legacy/CSM or UEFI-with-CSM.

• If Secure Boot was enabled on the original machine, re‑enable it; if you changed it while testing, put it back how it was.

If it still will not boot, the BCD/EFI usually needs rebuilding.

2. Rebuild boot files (UEFI/GPT)

On the target machine:

1. Boot from a Windows 10/11 install USB or recovery drive.

2. Choose “Repair your computer” → Troubleshoot → Advanced options → Command Prompt.​

3. In Command Prompt:

   • diskpart

   • list vol and identify the EFI partition (usually 100–500 MB, FAT32) and the Windows volume (the one with the Windows folder).​

   • sel vol <EFI#>

   • assign letter=T:

   • exit

4. Still in Command Prompt:

   • cd /d T:\EFI\Microsoft\Boot (create folders if missing).

   • Optionally rename old BCD: ren BCD BCD.old.​

   • Rebuild boot files:
     bcdboot C:\Windows /l en-GB /s T: /f UEFI (adjust drive letter and locale as needed).​

5. Close Command Prompt and reboot; keep the cloned disk first in the boot order.​

This recreates the EFI boot entry pointing to the cloned Windows, which fixes the common “cloned SSD won’t boot” problem when the EFI contents or GUIDs changed.​​

3. Rebuild boot files (Legacy/MBR)

If you’re definitely running legacy/CSM with an MBR disk:

1. Boot to the Windows USB → Repair → Command Prompt.

2. Run:

   • bootrec /fixmbr

   • bootrec /fixboot

   • bootrec /scanos

   • bootrec /rebuildbcd​

If that fails, you can point BCD explicitly at the cloned partition using bcdedit /store <drive>:\boot\bcd /set … device partition=<drive>: as in standard post‑clone repair guides.​​

4. If it still differs from the “original”

Even when it boots, differences can come from:

• Wrong partition cloned (missed System Reserved/EFI).​

• MBR↔GPT conversion by the cloning tool without rebuilding EFI.

• Moving to different hardware without running sysprep or a driver‑cleanup; DISM and driver refresh can help if Windows BSODs after the logo.