How to fix 'INACCESSIBLE_BOOT_DEVICE' on Windows

When encountering a blue screen error of "INACCESSIBLE_BOOT_DEVICE", most of the situations are caused by system boot or drive problems, and the system does not need to be reinstalled. 1. First check the hard disk connection and enter the BIOS to confirm whether the hard disk is recognized, ensure that the hard disk mode is AHCI, and avoid errors caused by motherboard BIOS upgrade or settings changes; 2. If the hard disk is normal, it may be that the boot file is corrupted. You can enter the recovery environment through the Windows installation USB disk, use the bootrec command to repair the main boot record, boot sector and rebuild the BCD; 3. If the problem occurs after updating or installing the driver, try to enter safe mode to uninstall the most recent updated or conflicted driver, and run DISM and SFC commands to repair the system files; 4. Troubleshoot hardware problems, check whether the memory stick is loose, and use tools to detect the health of the hard disk, such as CrystalDiskInfo to check for bad channels or SSD disk drops. Most of the above methods can solve the blue screen problem. If it still cannot be solved, then consider reinstalling the system.

If you encounter the blue screen error of "INACCESSIBLE_BOOT_DEVICE", don't rush to reinstall the system. This problem is actually quite common. In most cases, there is a problem with the system boot or hardware driver. As long as the operation is done properly, most of the situations can be solved by yourself.

The following methods are more practical, and you can basically do it by trying it in order:

1. Check hard drive connection and BIOS settings

This error is often caused by the system not being able to read the hard drive. You can try the following steps first:

• Turn off the computer, unplug it, and wait a few minutes before turning on it (especially desktop computers)
• Enter the BIOS to check whether the hard disk is recognized (usually press the Del, F2, F10 and other keys when powering on)
• Confirm whether the hard disk mode is AHCI (some motherboards are RAID by default, especially if they are easily error-prone after changing the system)

If you have just upgraded the motherboard BIOS or changed the hard drive mode, this error is likely to be triggered. At this time, you can return to the correct hard disk mode and return to normal.

2. Repair startup files using Windows Recovery Environment

If the hard drive is fine, it may be that the startup file is corrupted. It can be fixed in the following ways:

• Prepare a Windows installation USB drive and boot from USB drive
• Select Repair Computer > Troubleshoot > Advanced Options > Command Prompt
• Run the following commands in turn:
  • bootrec /fixmbr
  • bootrec /fixboot
  • bootrec /rebuildbcd

These commands will help you repair the main boot record, boot sector, and rebuild BCD (boot configuration data). After execution, restart to see if there is any improvement.

3. Uninstall the latest update or conflict driver

If you have this problem after updating the system or installing a driver, you can try to enter safe mode to deal with it:

• Select Troubleshooting > Start Repair in the installation interface
• Or run using the command prompt:
  • dism /image:C:\ /cleanup-image /restorehealth
  • sfc /scannow /offbootdir=C:\ /offwindir=C:\Windows

You can also try uninstalling the most recent update patch, or removing drivers that may cause conflicts (such as certain graphics cards, network cards, or storage controller drivers).

4. Check memory and hard drive health

Sometimes it's not a system problem, but a hardware failure:

• Loose memory sticks may also cause this error. Pull it down and wipe your gold fingers with an eraser and try it.
• If the mechanical hard drive is aging, you can use a tool such as CrystalDiskInfo to check whether there is a bad path
• If it is an SSD, please pay attention to whether the disk is frequently dropped or there is a need for firmware update.

Although this type of problem is not common, it is difficult to fix it through conventional means once it occurs. If you suspect it is a hardware problem, it is recommended to back up the data and replace the accessories as soon as possible.

Basically these are the methods. Most of the time it is caused by system boot or driver compatibility. According to the above method, it can generally be solved. If it really doesn't work, the last option is to reinstall the system.

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