Solved: INACCESSIBLE BOOT DEVICE in Windows 10
INACCESSIBLE_BOOT_DEVICE error is one of the most common blue screen of death errors. You may see this error during Windows startup if Windows cannot read data from the system or boot partitions. It happens frequently while upgrading to Windows 10. Faulty disk controller drivers are often the cause, and sometimes due to hard disk errors. If you encounter this error with Windows 10, try solutions here to resolve it.
Solution 1: Try disconnecting external devices
The error would occur if one or more devices are not compatible with the system. So if you have any other storage devices plugged in like an external hard drive, unplug them. This mostly works if the error occurs after resetting Windows 10 or while upgrading to Windows 10.
Solution 2: Go to Safe Mode and restart PC
Start Windows in Safe Mode, then restart it in Normal Mode. This is a simple solution, but it may work like a charm for you.
If you are not sure how to boot into Safe Mode, see How to Enter Safe Mode in Windows 10.
Solution 3: Disable or update any antivirus software
The antivirus software could be the cause because they may prevent Windows reading data from the system. If you have some antivirus software running, disable them. If you are uncomfortable with disabling, try updating the software.
Final Solution: Update faulty drivers
The problem probably being caused by driver issues. The steps above may resolve it, but if they don’t, or you’re not confident playing around with drivers manually, you can do it automatically with Driver Easy.
Note: If you are unable to boot Windows in Normal Mode, enter Safe Mode with Network then update the drivers.
Driver Easy will automatically recognize your system and find the correct drivers for it. You don’t need to know exactly what system your computer is running, you don’t need to risk downloading and installing the wrong driver, and you don’t need to worry about making a mistake when installing.
You can update your drivers automatically with either the FREE or the Pro version of Driver Easy. But with the Pro version it takes just 2 clicks (and you get full support and a 30-day money back guarantee):
1) Download and install Driver Easy.
2) Run Driver Easy and click Scan Now. Driver Easy will then scan your computer and detect any problem drivers.
3) Click the Update button next to all devices to automatically download and install the correct version of their drivers (you can do this with the FREE version).
Or click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system (this requires the Pro version – you’ll be prompted to upgrade when you click Update All).