MBR has corrupted, what will happen next?
The MBR (abbreviation for "Master Boot Record") is a boot sector (a region of your hard disk) that stores important information about the partitions of your hard drive. If the MBR on the secondary hard drive gets damaged, you will be unable to access this drive as usual. If the MBR on your primary hard drive is corrupted, you won't be able to boot your OS successfully and receive various error messages including:
Error loading operating system
No bootable medium found
Reboot and select proper boot device
In such cases, you will have to fix MBR Windows 7/8/10 to make your OS back to normal.
How to fix and repair damaged MBR in Windows 10/8/7?
So, how to fix MBR Windows 7/8/10? In this guide, you'll get a full guide to repair the Master Boot Record. Moreover, we will introduce how to fix MBR without and with installation DVD. Now, let's get started....
Part 1. Fix MBR without DVD
Sometimes, you might have found a great way to fix the boot record, but that required an installation DVD. What to do if you don't have one? Under this situation, you can turn to the free AOMEI Partition Assistant Standard, which allows you to create a bootable USB drive in Windows 10/8/7/XP/Vista and rebuild MBR in WinPE environment. Below is how to do it step by step.
Step 1. Connect an empty USB (it's better to be over 8GB) to a working Windows-based computer (since your Windows 7 cannot boot). Then free download the free MBR repair tool.
Step 2. Install and run AOMEI Partition Assistant on that PC. Click on the "Make Bootable Media" in the left pane. Follow the wizard to create a WinPE bootable USB disk. Disconnect the USB drive after it is done.
Note: AOMEI Partition Assistant Standard is pre-installed on the bootable drive.
Step 3. Plug the USB to your computer with a corrupted MBR, power up it and enter BIOS by constantly pressing Del (F2 or another specific key).
Step 4. Change boot priority to the bootable USB drive in BIOS. Press F10 to save the changes and restart computer to Windows PE mode.
Step 5. Once logged in, the AOMEI Partition Assistant Standard will load and start. In the main interface, right click the system disk you need to rebuild MBR and click "Rebuild MBR".
Step 6. A mini window will pop out, choose the proper MBR type for Windows 7 and click "OK".
Step 7. Click "Apply" > "Proceed" in the main interface to commit the change.
Finally, remove the bootable drive and restart your Windows 7.
Part 2. Repair MBR with installation media DVD
If you have kept your installation disc, you can try the following guide to fix MBR. Since different Windows comes with different repair process, we provide detailed guide to fix MBR in Windows 7, Windows 8 and Windows 10.
Tutorial 1. Fix the MBR in Windows 7
In order to fix MBR for Windows 7, first please put your original Windows 7 installation DVD into the computer's DVD or CD drive. Then do as the guide below.
Step 1. Boot your computer from the Windows 7 installation DVD.
Step 2. When the message "Press any key to boot from CD or DVD… "shows up, press any key to boot from the DVD.
Step 3. Select a "language", "keyboard layout" and click "Next".
Step 4. Select the operating system and click "Next". In the "System Recovery Options" window, click on "Command Prompt".
Step 5. When Command Prompt successfully launched, type the following commands and press enter each time:
Remove the installation DVD from the disk tray and restart your computer.
Tutorial 2. Fix MBR in Windows 8/8.1/10
Similar to the windows 7 MBR repair, you should first put the original Windows 8/8.1/10 installation DVD into the disk tray and boot your computer from it.
The guide is:
Step 1. At the Windows Welcome screen, click "Repair your computer".
Step 2. Choose "Troubleshoot" > "Command Prompt".
Step 3. When the Command Prompt loads, type the following commands:
Press Enter after each command and wait for each operation to finish.
Remove the DVD from the disk tray. Restart your computer and check if Windows can now boot.
Hope you all can fix MBR in Windows 7/8/10 by using the methods introduced in this article. Apparently, AOMEI Partition Assistant is a better choice. With it, you can quickly and easily fix MBR instead of inputting the complex commands. Besides, this versatile software could also empower you to check disk errors after the MBR fix, which will ensure there is no bad sectors on the system disk. If you want to fix or rebuild MBR in Servers, please try AOMEI Partition Assistant Server.