Repairing Inaccessible Boot Device Windows 10 Error


If you receive the error INACCESSIBLE_BOOT_DEVICE after upgrading to Windows 10, or after using Reset in Windows 10, this message suggests a way to resolve the problem. The INACCESSIBLE_BOOT_DEVICE error check usually indicates that the Windows operating system lost access to the system partition on boot. In this case, the system usually stops after a blue screen or stop error is displayed to protect against probable data damage or loss.

Here are some suggestions you can try to solve the problem. See what applies to you:

Method 1 - Uninstall installed packages


The problem may be caused by the installed Windows packages. Windows packages are installed without warning when Windows Update is installed automatically. To fix the "Inaccessible boot device" error, you can remove and uninstall recently installed packages.

Since you cannot start Windows 10 normally, you must go to Repair and use the DISM command to uninstall the packages.

Method 2 - Switching to Safe Mode


This is one of the most important step you must take to access your system and correct the error. For this tutorial, we use a system based on Windows 10. Usually we start windows in safe mode when we need to fix a problem. In Safe Mode, Windows runs with minimal configuration settings while all starters are disabled, and runs with the fewest hardware drivers that are just enough to load the operating system. So, if you encounter this error, switch to safe mode to solve the problem.

Method 3 - Checking the corrupted hard disk


Corrupted or damaged hard disks often lead to 0x0000007b blue screen or INACCESSIBLE_BOOT_BOOT_DEVICE errors. If you can enter Windows 10, follow these steps to check the damaged hard disk:

Use the Windows Win + X shortcut keys to open the jump list, then select Command Prompt (Admin).

Enter chkdsk /f in the dialog box and press Enter.

Windows automatically repairs errors on the damaged hard disk.

Method 4 - Uninstalling the video card driver


Some users claim to have received the error INACCESSIBLE_BOOT_BOOT_DEVICE after updating their video card drivers. To solve this problem, uninstall and reinstall the latest video card drivers. To uninstall the driver from your video card, do the following:

  • Download Display Driver Uninstaller.
  • After downloading the tool, start it and follow the instructions.

Your computer must be restarted after uninstalling the video card driver. After restarting, go to your graphics card manufacturer's website and download a new driver for your graphics card. Note that Nvidia users have reported this problem, but even if you don't have a Nvidia graphics card, you can still try this solution.

Method 5 - Activate AHCI mode


As already mentioned, an inaccessible boot device can also be caused by problems in the BIOS. This can often be corrected by enabling the Advanced Host Controller Interface (AHCI) mode from the BIOS.

To boot into the BIOS and activate AHCI mode, do the following

  1. To access the BIOS under Windows 10, click the Start button and go to "Settings".
  2. Click "Update and Security" in the Settings window.
  3. Click "Recovery" in the list and select "Restart Now" under "Advanced Start".
  4. Now click on "Troubleshooting" and select "Advanced Options".
  5. Click on "UEFI Firmware Settings" in the advanced options then on "Restart".
  6. Now your system will be rebooted from the BIOS menu.
  7. Once you are in the BIOS menu, switch to your SATA mode settings and enable AHCI mode.
  8. Save the changes and restart your PC.

If nothing works, you may need to reinstall your old operating system, such as Windows 8.1 or Windows 7, enable it, upgrade to Windows 10, enable it, and then clean Windows 10 with ISO.