By Lily / Last Updated December 4, 2019

Problem: inaccessible boot device on Windows 10 SSD

Inaccessible boot device on Windows 10 SSD is one of the most common BSoD(Blue Screen of Death)errors. Some users meet the problem at startup after they upgrade SSD while some have the issue after they reset their computer. What’s worse, some users are stuck in endless boot loop where Windows tells SSD is inaccessible and where it tries to fix the error but constantly fails.

Inaccessiable Boot Device

When you see “Inaccessible Boot Device”, it means your computer cannot read the Windows partition on the hard drive it boots from. It could mean total hard drive failure or a simple driver or boot record failure. Then, why does this error occur?

What accounts for inaccessible boot device on Windows 10 SSD?

There are two possible causes I’d like to share with you:

Incompatible graphic card driver

According to some users’ feedback, Microsoft programmers have analyzed inaccessible boot device error in Windows 10. They said imperfect system code and poor compatibility of previous versions could lead to incompatibility of graphic card driver with system code, thus causing inaccessible boot device error finally. Based on programmers’ advice, we can take following measures under this circumstance:

1. No operations until the computer’s automatic restart. It will prompt that it is attempting to repair and pop up following screen. Choose “Advanced options” then.

Automatic Repair

2. Select Troubleshoot > Advanced options > Startup Settings. Click the Restart button.

3. After the computer restarts, you’ll see a list of options. Press 4 or F4 to start your computer in Safe Mode.

4. Right click on the Start icon and select Device Manager. Expand Display adapters, right click on what you have under the catalogue and select “Uninstall”.

Device Manager

5. Your computer should restart after you uninstall your graphic card driver. After the restart, go to your graphic card manufacturer’s website and download new driver for your graphic card.

Corrupted boot information

If the boot information of your computer is corrupted, it may also result in inaccessible boot device error. In this case, you should check system partition for errors and rebuild the information. Find inaccessible boot device in Windows 10 fix from the next part.

How to fix inaccessible boot device on Windows 10 SSD efficiently?

AOMEI Partition Assistant Professional as a comprehensive partition manager can rescue you from inaccessible boot device error caused by corrupted boot information. The "Make Bootable Media" feature is of great help in case of boot failure. All Windows PC operating systems including Windows 10/8.1/8/7/Vista/XP are supported. Learn how to fix inaccessible boot device on Windows 10 SSD below:

Step 1. Connect a USB drive to a computer that is running Windows 10 and is in good condition. Install and launch AOMEI Partition Assistant. Click on “Make Bootable Media” on the left-hand pane and follow the wizard to complete the process.

Make Bootable Media

Tips: The bootable USB will contain installed AOMEI Partition Assistant.

Step 2. Insert the bootable USB into the computer which has a boot problem. Boot from the USB by changing boot order in BIOS.

Step 3. You’ll see loaded AOMEI Partition Assistant once login. Right click the system partition (here is C drive), select “Advanced” and then “Check Partition”.

Check Partition

Step 4. Select the way of checking errors to perform. Click “OK” to start checking.

Check Partition Check

Tips: You can also choose the first option to check and fix errors on system disk. However, it takes more time because the process is more complicated.

Step 5. After checking system partition for errors, it’s time to rebuild boot information. Right click the system disk (here is disk 1) and select “Rebuild MBR”.

Rebuild System Disk MBR

Step 6. Set the type of MBR for Window 10 in the pop-up window.

Choose MBR Type OS

Step 7. Click “Apply” and then “Proceed” to commit the pending operations. Restart your computer later.

Apply

Conclusion

When you encounter inaccessible boot device on Windows 10 SSD, you can fix the problem either by uninstalling the graphic card driver or by rebuilding MBR via AOMEI Partition Assistant. What’s more, you are able to solve no bootable device found in Windows 10, mbr2gpt validation failed problems with the help of AOMEI Partition Assistant. Don’t hesitate to get this tool and discover more!