The MBR (Master Boot Record) is a boot sector (a region of your hard disk) that holds information about the partitions of your hard drive and acts as a loader for the operating system you’re running. It is a key part of your PC’s startup system. If the MBR is damaged, you won’t be able to boot into Windows. All Windows versions – Windows XP, Vista, 7 or 8 – use MBR and, if damaged you won’t be able to boot.
If you ever have such a problem, you’ll need to fix the MBR to enable Windows to load again on your PC. Luckily, destroying the MBR is usually reversible. Here’s how to make everything right again.
Use Command Prompt to run the bootrec.exe /fixmbr command is a free way to repair MBR. However, it's really not a smart choice for average users because it requires a Windows bootable media or a system repair disk to enter the Windows Automatic Repair mode.
Fortunately, things become much easier when you get acquainted with EaseUS Partition Master, a professional disk management tool equipped with the "Rebuild MBR" feature.
Step 1
Download and launch EaseUS Partition Master on another working PC. In the main window, choose WinPE Creator.
Step 2
Then, choose to create a bootable disk on a USB or CD/DVD and click Proceed to start the process.
Step 3
When it is finished, connect the bootable disk to your corrupted computer and reboot the PC.
Step 4
Select to boot from EaseUS WinPE bootable disk. It will launch EaseUS Partition Master.
Step 5
In the main window of the software, right-click the disk you want to repair, choose Rebuild MBR, and then choose the proper Operating System version.
Step 6
Click Apply to save all the changes to fix MBR in Windows.
What are some of the tell-tale signs that your hard drive MBR is damaged? Besides the direct error messages that tell you that the master boot record is damaged, your computer may show some of the following errors:
"Error loading operating system" error
"Operating system not found" error
"Invalid partition table" error
"No bootable medium found" error
"Reboot and Select proper boot device" error
Whenever your PC fails to boot with one of the above errors, it suggests that MBR is corrupted and needs instant repair!
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