If you are an experienced computer user, then clearly you have heard about such a thing as the “blue screen of death”. This is the name of the error message that is associated with the Windows system. For the first time, such a problem arose in the version 3.1 system. Depending on the system, it looked different.
Error
If you saw Inaccessible Boot Device when loading Windows 10, then most likely you see the “blue screen of death”. Starting with the eighth version of the OS, its appearance has been updated. Now, instead of displaying technical information about the problem, a simplified version of the message is displayed.
Now the blue screen has turned blue. Instead of obscure codes, there is only a sad smiley and a request to restart the PC. This approach was adopted due to the fact that users do not usually read the huge array of technical information. They frantically click the power and restart buttons. Now the reason is briefly described at the bottom of the screen. And the appearance of such an error does not look intimidating.
Correction
How to fix Inaccessible Boot Device in Windows 10, not everyone knows. In addition, not everyone faces a similar problem. However, there are many causes of the problem and ways to fix them.
Usually there is a “sad smiley” after updating the BIOS, changing the hard drive, resetting the system, malfunctioning with disk partitions, etc. By the way, there are several more similar errors that can be fixed by the following methods. For example, NTFS_FILE_SYSTEM.
Preliminary
Before you get scared and frantically start looking for a solution to the problem for Inaccessible Boot Device (Windows 10), you should first do a couple of things. They are needed in order not to create even bigger problems, but to fix simple errors in the system.
First you need to remove all the drives from the computer - flash drives and memory cards. Perhaps something went wrong in the system and it starts loading from these devices. It is necessary to check the fact that the hard drive is the first in the download queue. This can be done in BIOS.
Remember: perhaps you recently tidied the case and accessories inside? HDD or SSD connectors could go off, disconnect, etc. Look at the "motherboard" connecting the hard drive to power via SATA-interfaces. Try moving from one port to another, or pull out the cable and reinsert. Even such simple manipulations can fix the Inaccessible Boot Device in loading Windows 10.
System Reset and Update
Perhaps you recently decided to upgrade or reset the system. For some reason, the “blue screen of death" might appear. There is one simple option to try to fix it. Next to the inscription that the system did not start correctly, there will be “Advanced Settings”.
Here you need to look for "Boot Options" and just restart the system. After that, the PC will restart, but at the same time it will prompt you to turn on in different modes. You need to select "Safe ...". He usually goes the fourth point. You just need to press F4.
Then the system turns on, but you fall into safe mode. Here it will be necessary to select "Restart" again through the start-up. There is an option that it is after this that work will resume. If all the same nothing helps, try to select "Recovery at boot" in the "Advanced options". The system will also try to troubleshoot. Perhaps this is the way to deal with Inaccessible Boot Device when booting Windows 10.
BIOS or nutrition?
Another reason why a sad smiley may appear on a blue background is the incorrect operation of the BIOS. An error can occur after updating the BIOS or if a power failure occurs. You can also check the battery on the motherboard. If it sits, then the BIOS settings "fly off", and, accordingly, a kind of error occurs.
Some users intuitively guess that a similar problem has occurred with their system. If you think the same thing, you can try switching to BIOS, check the settings. To do this, you will need to find a section with SATA equipment and adjust their work. For example, there can be two modes: IDE and AHCI. If the first is selected, switch it to the second, and vice versa. Remember to save changes and restart the system.
Disk damage
As mentioned earlier, if Inaccessible Boot Device appears when loading Windows 10, there may be a problem with the hard drive. It could either be damaged, or the partition structure has become different.
From the name of the error, it is clear that the PC cannot find the path to download the system files. They are located on the hard drive, which means, most likely, it was with him that problems arose. The bootloader cannot access the hard drive. The problem could be a file system crash or damage to the HDD. Perhaps the partition structure has changed on its own, or you did it.
One way or another, the solution for this is one. You must go to the system recovery environment. That is, select "Advanced Options", as we did earlier. But it happens that along with the description of errors there is no clickable link to go there. Then you have to use a boot disk or USB flash drive where your system is located.
Start the system from a flash drive, you can open additional parameters. Here you need to find the block with "Troubleshooting", again select additional parameters and call the command line. Next, you will need to determine the name of the section where the system is stored.
To do this, enter diskpart, then list volume. After that, the drive letter will appear, on which our system is located. Just in case, write it down, mark the letter of the bootloader section. To exit, enter exit.
If you still think that the Inaccessible Boot Device appears when the Windows 10 starts up because the disk is damaged, then chkdsk C: / r should be entered on the command line. Instead of “C” there may be the name that you previously indicated. After you need to press Enter and wait. If there are any system problems, they will be fixed immediately.
If you understand that the problem is caused by the fact that you messed up partitions and knocked down the structure, then at the command line, enter bcdboot.exe C: \ Windows / s E :. Again, the letters may vary, depending on your settings. Instead of "C" there should be a letter with the OS, and instead of "E" - the bootloader.
conclusions
The Inaccessible Boot Device error in loading Windows 10 may have a different solution. You can fix it in two minutes, or you can suffer all day. In this case, even a complete reinstallation of the operating system may become a solution to the problem. Therefore, you need to understand that installing a new version may require you to completely delete information on the hard drive. If there is information that is important to you, it is best to take care of saving it right away. Otherwise, you can lose all your data.