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Home Craft 4 Signs Your Windows Master Boot Record Is Corrupted or Damaged

4 Signs Your Windows Master Boot Record Is Corrupted or Damaged

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Being able to recognize the signs of a malfunctioning computer is an essential skill for any Windows user. The symptoms of a damaged or corrupted Master Boot Record can be challenging to diagnose accurately if you don’t know what to look for.


What Is the Master Boot Record?

The Master Boot Record, often referred to as the MBR, is the first sector of a bootable storage device. It contains a record of any partitions and information about the operating system for the boot process. It also includes software to prompt the rest of the OS to load.

When you press the power button on your PC, the BIOS software starts. The BIOS locates and executes the MBR, which completes the boot process.

In short, without an MBR, your Windows computer would be unable to start.

What Can Cause the MBR to Fail?

Numerous things can cause problems with the MBR. You are more likely to encounter one of the errors below on an older computer, where the cause could be a failing or damaged hard drive.

There are also a few types of malware that can change or even wipe the Master Boot Record. In terms of malware, the worst-case scenario is ransomware such as Petya. This is thankfully now a rare cause of the boot record failing.

No matter the cause, the signs or failure and the error messages you will see are usually obvious. If you know what to look for.

Signs Your MBR is Damaged or Corrupted

If your MBR is damaged or corrupted, it is unlikely that your computer will boot into Windows. But boot failure can be caused by other things. Here are the most common error messages that appear if the Master Boot Record is the problem.

1. Invalid Partition Table

One of the most common causes of this error message appearing is a damaged or corrupted MBR. It can also show up when the boot sequence is incorrectly set or if two or more partitions are set as active. But if you can discount these, and the message persists, it is probably the MBR at fault.

2. No Bootable Devices Found

This is another common sign that the Master Boot Record is damaged. It can also be worded as No bootable media found. If you see this error message and are sure that a hard drive is installed correctly, the MBR is likely the cause.

3. Error Loading Operating System

If this error persists after rebooting, it is almost always a sign of MBR failure or corruption. As explained above, the Master Boot Record is required to load the operating system. If it fails, so will the OS.

4. A Black Screen With No Prompt Message

If, when you try to boot, you end up with a black screen with no message, the first thing to look at for a solution is the Master Boot Record. The lack of an error message can be confusing. Testing to see if you can successfully boot into the BIOS should tell you that the MBR is the cause, rather than the critical failure of another component.

Don’t Worry: The MBR Can Be Fixed

Suddenly being unable to boot up your computer can cause an understandable amount of panic. Thankfully, a damaged or corrupted MBR is rarely terminal.

Although fixing the Master Boot Record isn’t always a quick process, it can be achieved by following logical steps.

If your Windows computer doesn’t boot, and you see one of the messages or signs listed here, reading our guide about fixing the Master Boot Record in Windows should be your next step.

Diagnosing MBR Failure or Corruption, Made Easy

The Master Boot Record is an integral part of your Windows system. If it fails or becomes corrupted, you can find yourself suddenly unable to make Windows load. Although this can be very worrying, as long as you can accurately diagnose the problem, there are ways to fix it.



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