Windows 10/8/7 Won't Boot from SSD

Tracy King updated on Oct 12, 2020 to Partition Master | How-to Articles

"I recently replaced my computer system disk with a new SSD disk. Now the problem is that I cannot boot from the SSD, how to solve this issue?"

If you are running into the same problem and trying to fix it on your own, follow the three solutions here.

Workable Solutions Step-by-step Troubleshooting
Fix 1. Boot Windows from BIOS Use a SATA cable to connect the SSD, restart...Full steps
Fix 2. Rebuild SSD and set to active Click "WinPE Creator" to create a bootable...Full steps
Fix 3. Fix BCD and boot Check solutions to either an MBR or GPT SSD...Full steps

Causes of Windows not Booting from SSD Error

The cases mentioned above are two real problems that happen to SSD users on Windows 10, 8 or 7 computers. Most of them don’t know how this problem happens and none of them have solutions to fix these troubles. If you are one of them, don’t worry. We have solutions for you. Let’s figure out why or how does your computer cannot boot on SSD drive first. Why does this error show up? Basically, this error occurs in these situations:

  • System disk upgrade: computer won’t boot from new SSD after upgrading disk from HDD to SSD.
  • Windows system error/failure.
  • Computer fails to boot after the system update.
  • SSD disk internal error.
  • The SSD is cloned and won't boot.

After you have figured out the reasons, you are able to solve this case. Here are some tried and true solutions to deal with the SSD booting error. If you'd like a fresh try, you can follow this page to Install or Migrate Windows OS to SSD without boot issue. 

Solutions 1. Set Windows to Boot from SSD via BIOS

If your computer cannot boot after upgrading or replacing system disk from HDD to SSD, the proper reason for this problem is that you may fail to reset the boot order in BIOS. To change the boot mode, you can refer to the following to configure it:

1. Use a SATA cable to connect the SSD to your computer.

2. Restart your PC. Continuously press a specific key (usually F2, F8, F12, Del) to enter BIOS Setup.

3. Then, use the arrow keys to select Boot Option. Here, you can change the boot order to boot from the cloned SSD.

Solution 2. Rebuild the SSD and Set it as Active

For this case, we suppose your SSD is MBR. Once MBR (Master Boot Record) disk is damaged, the system cannot be booted. In this situation, to rebuild MBR rather than reinstall the Windows will be much more convenient and time-saving. You only need to do two things: rebuilding the MBR and setting it active.

EaseUS Partition Master has already offered the function to rebuild MBR in the case of boot failure due to MBR problems. 

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 Windows 10 is supported

Note: Since your PC cannot boot from the SSD properly, connect the MBR hard disk to another working computer for repair. Or create a WinPE bootable disk to make your computer bootable.

To Rebuild MBR:

Step 1. Create a WinPE bootable disk.

  • Download and launch EaseUS Partition Master on a new PC which runs the same system as yours.
  • Click "WinPE Creator" on the toolbar. And select to create the bootable disk on a USB drive. If your computer has a CD/DVD drive, you can also create the bootable disk to CD/DVD.
  • Click "Proceed" to finish the process.
create a bootable disk

Step 2. Rebuild MBR.

  • Connect the bootable USB or CD/DVD to your PC.
  • Press "Del" when you are restarting the computer. Boot your computer from "Removable Devices" or "CD-ROM Drive". And then EaseUS Partition Master will run automatically.
  • Right-click the disk whose MBR is damaged. Choose "Rebuild MBR" to continue.
rebuild MBR
  • Select the type of MBR with the current operating system. Then, click "OK".
rebuild MBR
  • Click the "Execute 1 Operation" button at the top-left corner and click "Apply" to build the MBR. After that, your computer can boot normally again.
rebuild MBR

After you have rebuilt the SSD, you need to set the system partition as active.

To Set an Active Partition:

You still need the partition magic software to help you set the system partition active.

Before you make a partition active, you must make sure it is formatted and contains an operating system. Otherwise, your PC cannot boot from this partition!
If you set a partition as active and there was another active partition on the disk, it will be unset automatically. This might also prevent your PC from booting.

1. Select a primary partition to set as active from the list in the main window of EaseUS Partition Master.

2. Select Partitions > Set active. 
3. By clicking OK, you will add the pending operation of setting active partition.

set the partition as active to fix the stopped ssd

Then you can reboot your computer and boot from the SSD. If you still cannot boot from the SSD, the BCD error might be the main cause.

Do You Need Specialized Services for System Boot Issues?
EaseUS also provides 1-on-1 remote assistance to fix the boot issue. If the solution above does not work for you, please contact our professionals via Email or LiveChat in this page. To ensure our professional assistance work, you are suggested to connect the unbootable system drive to a healthy computer when getting connected with us.

Solution 3. Fix the BCD Error to Make the SSD Boot

MBR and GPT SSD have different steps, find the solutions respectively to solve the BCD error and then boot from your SSD.

1 - The SSD is MBR.

Step 1. If the system partition doesn't have a drive letter, assign one for it.

  • Open Disk Management under Storage by right-clicking Computer/This PC > Manage.
  • To assign a drive letter if one has not already been assigned, select the partition, click Add, click the letter that you want to use, and then click OK.

Step 2. Run Command Prompt as administrator.

Here, we suppose the system partition is E: Then, run the command:

bcdedit /store E:\boot\bcd

fix the mbr bcd error

Check that the System and boot pointers are correct after running. If they are not correct, use the /set command to fix them. For example, if the system partition should be M: it becomes E: You can follow this to fix it:

Bcdedit /store M:\boot\bcd /set {bootmgr} device partition=M:

2 - The SSD is GPT.

Step 1. Set the partition ID as basic ID.

The BCD mode on the GPT system is similar to the MBR, except that the GPT system disk is an EFI partition. You need to modify the partition ID to the Basic data partition ID by using the Diskpart set command on the EFI partition. 

set id=ebd0a0a2-b9e5-4433-87c0-68b6b72699c7  

set the gpt data partition as basic id

Step 2. Assign the drive letter and view BCD information

Then assign the drive letter. If the assigned drive letter is M:, then run the BCD edit command to view the BCD information.

bcdedit /store M:\EFI\Microsoft\Boot\BCD

fix the gpt error

If the partition is pointed to an error, use the /set command under BCD edit to modify it correctly. The modification is the same as that in the MBR.

If there is a startup problem after modifying the BCD correctly, you need to check the Active partition is set for the MBR disk while the GPT system disk needs to add the startup item. If you still have the problem, you can also contact us.

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Will the "Migrate OS" feature transfer the Windows system files only or the whole C drive?

To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions. Generally, the boot partition is the C drive so the transfer will include all the files in C.

Does EaseUS Partition Master license apply to multiple computers?

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What is the difference between EaseUS Partition Master Trial version and the Free version?

Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine.

Will it cause any data loss after resizing the partition in EaseUS Partition Master?

Generally, it will not cause any data loss or boot issue by resizing a partition. However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?

On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.

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How to Partititon a Hard Drive on Windows 10/8/7