An MBR holds the primary partition table of the hard disk and is responsible for booting the operating systems. MBR is the first program that is accessed when the system is started. It contains the critical information such as number of partitions , information about active partition and so on.
Corruption in the MBR can also lead to a dead hard disk. The corruption can happen due to virus infections, human errors, abrupt system shutdown, etc. In this case a third-party hard drive recovery software to resolve the issue.
Consider a scenario wherein you have a Windows 7 system. When you switch it on, it fails to start as its Master Boot Record (MBR) has been corrupted. You then try to run the Startup Repair tool to fix the MBR. However, the tool shows that there are no problems.
Cause:
The root cause for this problem is that there could be a flash drive inserted in the computer. Because of this, the computer hardware sometimes acknowledges it as the system partition. And the Startup Repair tool scans the flash drive in place of the original system partition on the hard disk. As there is no corrupted MBR on the flash drive, no problem is detected.
Resolution:
To resolve this issue, you should perform the following steps:
Eject the flash drive from the computer.
Insert the Windows 7 installation DVD in the disc drive.
Start the computer.
Press any key when there is a prompt to do so.
Select language, time, currency, keyboard, input method, etc.
Click Next.
Click the Repair your computer option.
Click the operating system that is to be repaired.
Click Next.
Click Command Prompt in the System Recovery Options dialog box.
Enter Bootrec.exe/fixmbr and press Enter. This command would fix the MBR issue.
However, if you still are not able to resolve the issue then you should use a third-party hard drive recovery software to recover lost data in the system. Such read-only tools are able to recover hard drive by employing fast yet sophisticated scanning algorithms without overwriting the original data.
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