By Cherry / Last Updated September 11, 2019

What is MBR?

MBR, the short of master boot record. According to Wikipedia, the MBR is a special type of boot sector at the very beginning of partitioned computer mass storage devices like fixed disks or removable drive intended for use with IBM PC-compatible systems and beyond. The MBR holds the information on how the logical partitions, containing file systems, are organized on that medium. It also contains executable code to function as a loader for the installed operating system - usually by passing control over to the loader’s second stage, or in conjunction with each partition’s volume boot record. This MBR code is usually referred to as a boot loader.

When you try to boot your computer, what the PC does first is to look for where the operating system located, and it finds by looking at the MBR. If there is any MBR Error, the operating system cannot be loaded and the computer will grind to a standstill.

MBR Errors

Many users may meet MBR Errors on Windows startup because the operating system cannot be located, or you may given no indication at all of what has gone wrong and face only a blank screen. The error may be MBR Error 1, MBR Error 2, MBR Error 3. Here is some truly cases we found in some forums:

1. MBR Error 1

“I have a major problem booting up my PC installed Windows 7 Professional. I keep getting the error message“mbr error 1 Press any key to boot from floppy” every time I reboot my PC.

2. MBR error 2

“Hi, all, My system is locked solid, no problems other than that. Nothing seems to be affected negatively. It just started appearing one day, probably after I removed some software or added something, it showed“MBR Error 2”. My operating system is Windows 7”.

3. MBR error 3

“When I start my Windows 7 Home Premium, I got MBR Error 3. Then Windows 7 starts and work very fine. I have 2 questions: What means MBR Error 3 and how can I repair it?”

All of those point to corruption or failure within the MBR. The cause of such problems basically boils down to two things. One is your PC is trying to load the operating system for an external device such as an external hard disk, or a USB flash drive, and finding that it can’t reboot because there is nothing there. You may also be reminded“Missing operating system” at startup when you installed a USB drive or external hard drive to the PC before. Try disconnected the external devices and restart your system to see if that is the problem. The other is the MBR has become corrupted or gone missing for some reason. If it because of this, you should restore it along with any other missing files from your system backup device. However, many users have mislaid this or have never made a backup, which made this option invalid.

Well, is there any other methods for fixing MBR Errors?

How to fix MBR errors?

To fix MBR Error 1, MBR Error 2, or MBR Error 3, here we provides you two methods as the below:

Method 1. Fix MBR through command prompt

You can follow the procedure to remove the error message successfully.

1. Start your PC with a Windows 7 installation CD/DVD.

2. Click Repair Computer -> Recovery Option-> Command Prompt.

3. Type the following commands to remove the error message:

Bootrec.exe /FixMbr

Bootrec.exe /FixBoot

Method 2: Fix MBR via MBR repair tool

You can also use an MBR repair tool to fix MBR with simple steps. Speaking of MBR repair tool, here we highly recommend you the freeware AOMEI Partition Assistant, which can help you fix MBR easily and simply.

Before you do, you need to prepare for it:

Free download AOMEI Partition Assistant, install and launch it to a normal computer, and use it to create a bootable media (USB, CD/DVD).

Then, you can follow the steps below to fix master boot record errors for booting successfully.

Step 1. Insert the bootable device you created before to the computer with MBR errors, and boot the PC from the bootable device (You may need to change the boot order in BIOS).

Step 2. It will show you the main interface of AOMEI Partition Assistant. Right click the system disk, and select Rebuild MBR.

Rebuild System Disk Mbr

Step 3. Select the type of MBR for the current OS.

Choose Mbr Type

Step 4. Finally, click Apply on the toolbar to execute the operations. When the operation finished, shut down the computer, remove the bootable device and boot your PC from the original disk.



Those two methods may help you fix MBR Error 1, MBR Error 2, MBR Error 3. You can choose any method you like.

AOMEI Partition Assistant is a great disk partition manager that can not only help you fix MBR Errors, but also can help you check errors on hard drive, and supports you to do a surface test for disk. And you can upgrade to AOMEI Partition Assistant Professional edition to unlock more functions for a better experience.