How to Fix “Inaccessible Boot Device” Error in Windows 10

Inaccessible Boot Device is an annoying error or stop code that appears as a reference when you meet Blue Screen problem on Windows 10. This issue commonly occurs when you start your system. Windows becomes unable to detect and decipher the data that comes out from boot components and goes to BSOD including the error message. Sometimes the mess up comes into existence because of bugs in the updates pushed by Microsoft. But don’t worry, easy solutions are available to fix Inaccessible_Boot_Device trouble.

Inaccessible Boot Device Error in Windows 10 Solutions

Inaccessible Boot Device Photo 1

Workaround-1: Removal of Troubling Update files

Microsoft keeps on releasing updates for Windows 10 with a view to make it more productive and secure as well as free from bugs but it is so hard. Inaccessible Boot Device Blue Screen of Death Error in Windows 10 is such a new bug found in the latest update. The reason behind this is the release of cumulative and Delta updates to the Windows Server Update Services and System Center Configuration Manager.  Error occurs when they attempt to install both the updates at the same time.

A new bug is always hard to resolve, however, Microsoft has already come up with the publishing fix. Their TechNet Website raised some other instructions in order to fix Inaccessible Boot Device Error in both Windows 10 fall creator update and Anniversary update. The solution is rather easy to accomplish. Pay your attention to the following resolution processes we will discuss in fixing this nagging error.

Follow the way to Remove the culprit Update files

Step-1: First and foremost, Boot your computer from a “USB Flash Drive“.

Note – If you face difficulties in booting via USB bootable media, you should try changing the BIOS settings first so that it can boot from USB directly and correctly. BIOS settings are accessible by powering the PC and pressing the any of Function keys. We recommend you to follow the makers’ support for the sake of avoiding any further errors.

Step-2: Click Next and it will take you to a new window. Here, you need to hit the link entitled Repair your computer which is located at the bottom right corner of the page.

Step-3: Proceeding ahead, click on the option Troubleshoot in the Advanced startup panel.

Inaccessible Boot Device Photo 2

Step-4: Click/hit on Command Prompt from various options on the following screen.

Step-5: Next task is to delete the SessionPending Registry key. To do so, type the given series of commands at the blinking cursor and press Enter after each.

reg load HKLM\temp c:\windows\system32\config\software

reg delete "HKLM\temp\Microsoft\Windows\CurrentVersion\Component Based Servicing\SessionsPending"/v Exclusive

reg unload HKLM\temp

Step-6: After deleting the Registry Keys, you need to pull the installed packages by entering this specific command. Hit the Enter key from the keyboard in order to initiate the action.

dism /image:C:\ /get-packages

Step-7: In the Packages Listing, look for the item labeled as Installed Pending because they are the one causing issues. So, you have to create a temporary folder to move all the ill updates, and to do so. type this command below and press Enter:

MKDIR C:\temp\packages

Step-8: Finally, type the given Command and run it by pressing Enter in order to remove the troublesome updates.

dism /image:c:\ /remove-package /packagename:PACKAGE-IDENTITY-NAME /scratchdir:c:\temp\packages

After the updates have successfully removed, Restart the computer and the error should not appear anymore on the screen. The computer should boot now normally.

Workaround -2: Perform SFC scan for checking system files

Windows 10 has default System File Checker for settling the Inaccessible Boot Device error. This actually repairs the broken system files as well as restores the corrupted ones. The steps are as follows:

Step-1: Type cmd in the search box located at the taskbar. While Command Prompt appearing at the top of search result hit a right-click from the mouse on it and select Run as Administrator.

Step-2: On the black panel, type the following command at the blinking cursor and hit Enter key.

Sfc /scannow

Inaccessible Boot Device Photo 3

Step-3: System will start checking for the broken and corrupted files. According to the scan result, Operating System will repair those files. But if you confront ‘Windows Resource Protection found corrupt files but was unable to fix some of them’ message as a scan result, you need to log into the computer in “Safe Mode“. Follow the above procedure to run the same command with a view to repairing the broken system files.

Read more about SFC /Scannow, DISM.Exe, CHKDSK Windows 10.

Workaround-3: Check Faulty Hard Disc

Faulty hard disc drive often causes “0x0000007b Blue Screen of Death” or alternatively Inaccessible Boot Device error to occur. If it is possible to log in to the PC, follow the below guidelines for resolving the error:

Step-1: Go to the Cortana search box beside the Start menu and start typing cmd. When Command Prompt shows up on the top, keep a hold on the Ctrl and Shift keys. While pressing them hit Enter key to access elevated Command Prompt.

Step-2: Upon the UAC prompt, click Yes to continue further.

Step-3: Type in or copy/paste chkdsk /f command in the command prompt panel followed by pressing Enter key.

Inaccessible Boot Device Photo 4

Step-4: Windows will prompt you for restarting the computer before initiating the scan. Type Y in Command Prompt and press Enter key as well.

Step-5: Windows will now start checking for the broken file automatically after the restart and also will repair based on scan result. Hence, the error will not appear anymore on your computer.

Workaround-4: Enable AHCI mode in BIOS

Modern PCs nowadays have BIOS to initialize as well as check the system hardware components. It also loads a bootloader alternatively operating system from a mass memory device. However, enabling Advanced Host Controller Interface (AHCI) mode in BIOS might solve the error too. You need to observe the below steps for doing so:

Step-1: Enter BIOS by pressing F2 or Delete function keys while the computer is booting.

Step-2: After entering into BIOS, reach out to the Advanced section. Now toggle the option Set AHCI Mode to Enabled.

Note – As an optional choice, you can toggle the AHCI Mode Control to Auto.

Step-3: Hit the Save button and Restart the computer.

Keep it in mind that we have provided a general solution to enter BIOS and it may differ in various models. We advise you to follow the motherboard instruction to avoid any inconveniences. This will probably resolve your error. If it doesn’t, follow the next solution.

Workaround-5: Update Drivers

Drivers are the programs that allow the Windows 10 OS to utilize the hardware efficiently. This is indeed a necessity to keep them up to date. An outdated driver in the same way incompatible can cause the various errors including “Inaccessible Boot Device BSOD error” on your computer.

Updating a driver is rather too easy. You just need to visit the manufacturers’ website and download then after satisfying the configuration and demands of the model. So many users reported that they were passing terrifying days with this error for IDE ATA/SATA controller driver. They have also confirmed that, after updating the driver, the error was finally resolved successfully.

For reference, go through our tutorial on How to Uninstall, Disable, Roll Back, Update Device Drivers in Windows 10 / 8 / 7.

Workaround-6: Check the loose cables

In some other cases, loose cables are also equally responsible for creating Inaccessible Boot Device BSOD error on your computer. Therefore, a cross-checks of all the connection and connecting tightly may also fix the problem. Sometimes, using different ports on the motherboard for connecting hard drive cures the same. You can do the following:

Step-1: ‘Shut Down‘ the computer by going the Start menu and clicking on the Power icon.

Step-2: Close the power supply going to the computer.

Step-3: Unplug all the cables and accessories. Change the hard disc drive connecting the port to the motherboard.

Step-4: Plug in all the cables following the layout as same as it was before.

Step-5: Open the power supply again and Turn On the PC.

Now check for the error again. Many of the users are well benefited using this resolution. Hope your one will also be fixed.

Workaround-7: Enter into the Computer in Safe Mode

Third party un-authorized software can also cause Inaccessible Boot Device BSOD error. However, entering the computer in Safe Mode will solve the issue too. Safe mode refers to start the computer without any third party software involving only the basic ones. You need to observe the below steps in order to Enter the Safe Mode.

Step-1: Restart the computer while booting and continue this until the Automatic Repair comes into action.

Step-2: Now from a new screen, select Troubleshoot. Proceeding forward, hit on the Advanced option and then Startup Settings.

Step-3: From here, click on Restart button. Upon starting, there will be a list of options appearing on the screen with function keys beside them. Press F5 for the sake of entering the “Enable Safe Mode with Networking“.

Inaccessible Boot Device Photo 5

Check the computer is operating without any trouble or not. If there is no problem, update or uninstall the drivers causing the error to occur using the safe mode. Therefore, the issue may be fixed completely in this way.

Workaround-8: Reflash the BIOS

Corruption in BIOS is also responsible for the Inaccessible Boot Device. If you can ensure that BIOS is the culprit, reflashing might be the most effective solution. Remember, Reflashing is an advanced option and not recommended always. You must do this with utmost care. Any mistake in doing so may cause permanent damage to the computer. You need to follow the proper guideline from the official website for doing this reflashing.

Workaround-9: Reset Windows 10

If all of the solutions above go in vain, you have the last option to reset Windows 10 with a view to resolve the error. Do not forget to save a backup of all the necessary items from your Disc Drive partition (C:) as it will cause all the files to be removed from it. You need to have Windows 10 Installation Media for proceeding. Creating a “bootable USB Flash Drive” having Windows 10 is necessary. If you don’t have a copy, you can easily have it visiting Windows Media Creation Tool. After having all these, do the below steps:

Step-1: Restart the computer while booting as to Start the Automatic Repair Mode.

Step-2: Upon appearing a new screen, Click on the Troubleshoot and reach out to the option ‘Reset this PC‘ on the following page.

Step-3: Moving on, hit Remove Everything option. You will be prompt to insert the Windows 10 Installation Media. Insert it in the first place.

Step-4: Select the option namely Only the drive where Windows is installed after inserting and then ‘Just remove my files‘.

Step-5: Click the Reset button for initiating the process and keep on following the on-screen instruction till it is completed.

Read more about this solution here – How To Reset Windows 10 Removing Everything, Keeping Files.


Microsoft is trying all their very best for improving Windows 10. New updates sometimes come with problematic things but those can also be fixed easily. Inaccessible Boot Device Error in Windows 10 affected the computers configured in the business environment while the common users are still safe. We have discussed the resolution processes for fixing the error. Read the steps properly and comply with the steps accurately if same error appears on your screen too.

About Sunita
Avatar for Sunita
Love to play with Windows 10. Suggestion - Going for Registry change or system files edit then remember to take a backup or create a restore point before Starting.

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