If you receive INACCESSIBLE_BOOT_DEVICE error after you have upgraded to Windows 10, or after you used Reset in Windows 10, then this posts suggests a way to overcome the issue.
The INACCESSIBLE_BOOT_DEVICE bug check usually indicates that the Windows operating system has lost access to the system partition during startup. If this happens, the system usually shuts itself down after showing a Blue Screen or Stop Error to protect itself from probable data corruption or loss.
INACCESSIBLE BOOT DEVICE
Here are a few suggestions you can try to resolve the issue. See what applies in your case:
1] If you think a boot device may at fault, you may need to edit the boot options.
2] Remove any recently added hardware.
3] Check if the disk firmware version is incompatible with Windows 10. If not, you may need to update to the latest firmware version. See if you need to update the BIOS.
4] If you recently added a driver, restart your computer, enter Advanced Boot Options menu, select the Last Known Good Configuration option. You may boot Windows 10 into Safe Mode and try a system restore or a Rollback.
5] If you think the cause could be hard disk corruption, Run Chkdsk /f /r on the system partition. If you cannot boot into Windows, use the Recovery Console and run Chkdsk /r or run Chkdsk from the Repair Console.
6] If you just upgraded to Windows 10 and then you are seeing this error, then, download and use Media Creation Tool, using another computer and save it to a USB device. Use it to perform a clean install, by clicking on the setup file or booting from the USB. If you are asked for a product key, click on Skip this step. Windows 10 will activate itself, when you sign in with your Microsoft account.
7] If nothing works, you may have to fresh-install your earlier OS, viz. Windows 8.1 or Windows 7 operating system, activate it, upgrade to Windows 10, activate it and then clean install Windows 10 using ISO.
8] This post will help you if you receive 0x7B INACCESSIBLE_BOOT_DEVICE Blue Screen after Windows Updates.
Let us know if any of this helped you or if you have any other suggestions to make. This post gives you additional tips on fixing Blue Screen of Death in Windows 10.
See this post if you receive An unexpected I/O Error has occurred, Error code 0xc00000e9 message on Windows.