By Dervish / Last Updated September 26, 2023

When need to fix MBR on SSD?

MBR (Master Boot Record) is created while making the first partition on an SSD and always locates on the first sector. It’s the significant data structure containing the Partition Table for the SSD drive and a small amount of executable code for the boot start. Without a valid MBR, you cannot boot your system from an SSD. For example, when you migrate OS from HDD to SSD but to find that the SSD is unbootable and displays error information as "operating system not found" "missing operating system" or "invalid partition table". In such a situation, you should consider that there may be something wrong with the MBR on SSD. In order to solve the problem, you should fix MBR on SSD.

How to fix MBR on SSD via freeware

Though Windows Recovery Console can repair your corrupter MBR, only if you can access the Recovery Console and you know exactly which command to type for your version of Windows. Here, in order to make things easy, we recommend you AOMEI Partition Assistant Standard.

Before we start doing so, please prepare bootable disk with Windows PE installed which should be of any Windows edition released after Windows 7, in this way, you can start your computer from bootable disk and fix MBR on SSD. (Or you can unplug your SSD and plug it into another machine so as to make the fix job operable.)

Now, we will show you how to fix MBR on SSD with AOMEI Partition Assistant.

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Step 1. Install and launch AOMEI Partition Assistant Standard. Select the SSD and right-click it to choose “Rebuild MBR”.

Rebuild System Disk MBR

Step 2. Set the type of MBR in the pop-up window. (Choose a proper MBR type according to your operating system.)

Choose MBR Type

Step 3. Click “Apply” on the toolbar to commit Rebuild MBR operation.


Tip: "Rebuild MBR" only can solve problems such as MBR code has been damaged. To deal with OS unbootable problem which is caused by bootable file or system file missing is beyond its abilities.

Here, free AOMEI Partition Assistant Standard Edition is so convenient as other paid editions of AOMEI Partition Assistant to help you fix MBR on SSD. Of course, if you want to solve some problems with an easier way, for example, if you want to make use of the free space of one big partition and add it to another small partition, you can use paid AOMEI Partition Assistant Professional Edition to “allocate free space” from one partition to another directly.