When an error "INACCESSIBLE_BOOT_DEVICE" appears, it is usually caused by hardware problems, driver conflicts or system file corruption. The solution is as follows: 1. Check the hard disk connection and confirm that it is recognized in the BIOS, and use the tools to view the hard disk health status; 2. Use Windows installation media to enter the repair interface and run the startup repair function; 3. Execute the bootrec command at the command prompt to rebuild the BCD and repair the boot record; 4. Update or roll back the storage controller driver, and check the SATA mode settings in the BIOS. In most cases, priority will be given to troubleshooting hard disk connection and boot record issues. If it is invalid, then consider reinstalling the system or replacing the hard disk.

When an error in Windows "INACCESSIBLE_BOOT_DEVICE" usually means that the system cannot access the boot device. This problem may be caused by hardware issues, driver conflicts, or system file corruption. If you encounter this blue screen error, don't panic. Here are some common solutions.

1. Check the hard drive connection and hardware status

This is the most basic and easiest step to be overlooked. If the hard disk connection is loose or there is a malfunction, the system will naturally not be able to read the startup information.

• Desktop users can try to re-plug and unplug the hard disk cable and power cord after shutting down.
• Although it is not convenient for laptop users to disassemble the machine, they can try to use an external hard disk box to connect the hard disk to another computer to check whether it can be recognized.
• In addition, enter the BIOS or UEFI settings to confirm whether the system has recognized the hard disk (usually press F2, Del, or Esc keys to enter when powering on).

This problem can also be caused if the hard drive itself has bad channels or is seriously aging. You can use tools such as CrystalDiskInfo to view the health of the hard disk.

2. Startup Repair

The boot repair function that comes with Windows can automatically detect and fix some common boot problems.

The operation steps are as follows:

• Use the installation USB drive or recovery disk to enter the "Repair Computer" interface
• Go to "Troubleshooting → Advanced Options → Start Repair"
• The system will try to automatically fix the boot problem

Sometimes this step can solve the problem, especially when the boot record is corrupted or the system files are lost.

3. Rebuild BCD and repair boot records

If the startup repair is invalid, you can try manually repairing the boot configuration data (BCD).

At the command prompt, enter the following commands:

 bootrec /fixmbr
bootrec /fixboot
bootrec /scanos
bootrec /rebuildbcd

These commands are used to repair the main boot record, write to a new boot sector, scan the installed Windows system, and rebuild the BCD storage.

Note: Before executing these commands, you need to make sure that you have entered the correct recovery environment and selected the correct system partition.

4. Update or rollback the storage controller driver

Sometimes this problem is due to driver incompatibility issues caused by AHCI or RAID mode switching.

• If you can enter safe mode, open Device Manager, find "IDE ATA/ATAPI Controller" or "Storage Controller", and right-click to select Update Driver.
• If you have recently changed the motherboard settings or updated the driver, you can try rolling back to the previous version.
• Check if SATA mode is AHCI in the BIOS (if not, try changing and restarting to see if there is any improvement).

Basically these commonly used methods. In most cases, the problem lies in the boot record or hard drive connection, so it is faster to start with these two aspects. If you have tried it all, it may be that the system is seriously damaged. Consider reinstalling the system or replacing the hard drive.

The above is the detailed content of How to fix INACCESSIBLE_BOOT_DEVICE error in Windows?. For more information, please follow other related articles on the PHP Chinese website!