By Ailsa / Last Updated May 15, 2020


I am suffering from a terrible issue: I did a clean reset for my computer after having some problems with Windows 10. I proceeded to reset my PC. During the process of resetting, it came up with Windows 10 logo and the loading wheel while the resetting circle reached 100%. Then it went to a blue screen with an error message: Your PC ran into a problem and needs to restart. We’ll restart for you. If you’d like to know more, you can search online later for this error: INACCESSIBLE_BOOT_DEVICE. Then it restarted and stuck in Windows 10 INACCESSIBLE BOOT DEVICE loop. Please help, thanks a lot.


The Causes to Windows 10 INACCESSIBLE_BOOT_DEVICE (Error 0x0000007b)

The INACCESSIBLE BOOT DEVICE has an error code: 0x0000007B. Why the Windows 10 INACCESSIBLE BOOT DEVICE error occurred? Microsoft claimed that the error indicates the Microsoft Windows operating system has lost access to the system partition during startup. Therefore, Microsoft listed the causes might induce the INACCESSIBLE BOOT DEVICE error:

  • Boot device failure. The boot device driver might fail to initialize the boot device during I/O system initialization.

  • File system initialization failed.

  • Repartition the system partition.

  • Change the BIOS configuration.

  • Incompatible disk hardware, like install a disk controller and add a hard drive, which might be incompatible with your Windows operating system.

Whatever the cause is, you have to know how to fix INACCESSIBLE BOOT DEVICE Windows 10. Thus, below we will give you the best 5 ways to resolve.

5 Ways to Fix INACCESSIBLE_BOOT_DEVICE in Windows 10

You can try these ways to solve INACCESSIBLE BOOT DEVICE error after Windows 10 update or BIOS update:

1. Remove the recently added hardware, especially hard drives or controllers, to see if the error is fixed. The error maybe caused by incompatible disk hardware.

2. Revert changes to BIOS settings if you have done or update BIOS and Firmware.

3. Booting into Safe Mode loads a core set of storage drivers if you can boot Windows, then restart your PC to see if the issue is solved.

4. Create bootable media to perform a clean install.

5. Repair corrupted or missing system files if you cannot boot your PC.

The first 4 ways are quite simple, in our post, we will introduce you the last way to repair Windows 10 INACCESSIBLE BOOT DEVICE error. If the system files is corrupted or missing will result in this problem, the corrupted or missing system files probably will be the Master Boot Record (MBR). Then, how to repair MBR for your computer? Use the freeware-AOMEI Partition Assistant Standard to rebuild MBR. Before you do, create a bootable media with a normal PC to boot your Windows 10, then rebuild MBR under WinPE via AOMEI Partition Assistant Standard. Below are the details:

Step 1, Free download, install and run AOMEI Partition Assistant Standard, insert your USB drive to the computer and make sure it can be detected. At the left side, select Make Bootable Media. Press Next in next window.

Make Bootable Media

Step 2, Tick USB Boot Device, then press Proceedto create bootable USB.

USB Boot Device

After a few minutes, the bootable USB drive is ready. Then boot your Windows 10 PC via the bootable USB drive, then run AOMEI Partition Assistant Standard to rebuild MBR.

Step 1, On the main window, click Rebuild MBR underDisk Operations column.

Rebuild MBR

Step 2, Choose the proper MBR type for your Windows 10 OS.

MBR Type

Step 3, Click Apply to rebuild MBR to fix INACCESSIBLE_BOOT_DEVICE in Windows 10.


Apart from these two functions, AOMEI Partition Assistant also provides the service for migrating OS to SSD, partition recovery, Integrate to Recovery Environment, and more. Moreover, for advanced users, you can try the AOMEI Partition Assistant Professional edition.