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Cloned Drive Won't Boot

Cloned Drive or SSD Will not Boot

Problem: You try to clone  your hard drive to a new HDD or SSD without reinstalling Windows and all the previously installed programs. After that, the cloned HDD or SSD won't boot, and you need to make the cloned drive bootable.


Situation 1: Clone one hard drive to another on the same computer
If you are cloning hard drive to another hard drive on the same computer, but the cloned hard drive won't boot later, you can try the following ways to make cloned drive bootable:

1. Check the startup settings
Step 1. Press a specific key, usually Del for desktop and F2 for laptop, to enter BIOS settings.

Step 2. Under Boot tab, make sure the cloned drive is first boot order.

If your cloned drive is a GPT disk, make sure the UEFI boot mode is enabled, and if it is an MBR disk, then set it to Legacy boot mode. If your computer does not support UEFI boot mode, you need to do a GPT to MBR conversion before you can boot from the cloned drive. As you may know, some software allows you to clone MBR to GPT disk or back without disk conversion. The computer is not using the correct boot mode is one of the reasons why cloned SSD not booting.

2. Use repair option via a Windows System Repair Disc
Step 1. Boot from the system repair disc, and try the first option, Startup Repair.

> If it doesn't work, you can try Bootrec.exe, which can is available in Command Prompt to fix cloned HDD won't boot. Open the last system recovery option, Command Prompt, and enter the following command in order:

bootrec.exe /fixmbr
bootrec.exe /fixboot
bootrec.exe /scanos
bootrec.exe /rebuildbcd
If you have neither a repair disk to repair cloned hard drive won't boot in Windows 7, nor recovery drive to fix Windows 8 or windows 10 cloned SSD won't boot, you can use the third party software AOMEI Partition Assistant Pro to create a bootable media, and boot from it to use one of its features Rebuild MBR for making your cloned HDD or SSD bootable.

Situation 2: Clone disk from one computer to another

If the cloned hard drive won't boot after you clone disk from one computer to another different one, apart from using the 2 methods in the first situtation: check the starup settings and use the bootrec.exe tool to fix MBR or BCD settings, you can also try the following another two solutions.

1. Check the connection mode If the original computer uses IDE mode, the destination computer has to use IDE mode. If the source is AHCI, then the target AHCI mode.

2. Use Dissimilar Hardware Restore Back up the source HDD onto an external storage device using AOMEI Backupper. Then create an AOMEI bootable media to boot the target computer and restore the backup to the destination HDD with Universal Restore option enabled. Usually, Bootrex.exe tool can fix the cloned hard drive won't boot problem, but when you install the cloned drive to another computer with dissimilar hardware, the bootrec.exe tool may not be able to enough because the different hardware requires different drivers. In this case, you can use AOMEI Universal Restore.

3. Make sure the partition is active. To do that, run these commands

    1. diskpart
    2. list disk
    3. select disk 0, where 0 is the number of your disk
    4. list partition
    5. select partition 0, where 0 is the number of your partition number
    6. active
    7. exit