Turn off your PC by pressing the Power button and unplug the power cable.You can try resetting the hard drive to fix the error. Connect all the needed devices and see if the error is resolved.Once the Startup menu appears, use arrow keys to navigate to Start Windows Normally and hit Enter.Now, press the Power button again to reboot your system.After that, press the Power button for about 15 seconds to drain out the residual charge.Make sure there is no peripheral device connected now to your PC.Turn off your PC and remove the AC adapter from it.Several Windows users have reported that performing a hard reset has helped them fixing this error. When you perform a hard reset, it rebuilds the connection between the hardware and BIOS. You can try the following troubleshooting methods to fix the Windows 10 boot device not found error.
How to Fix the Boot Device Not Found Error? There could be several reasons behind this error, such as: However, when the system can’t detect or access the hard disk, you may find the ‘Boot Device Not Found’ error popping up on your screen. To complete the process, BIOS takes charge and access certain system files from the internal hard drive. The operating system loads into RAM during the booting process. The error occurs when your system hard drive finds difficulty in supporting the boot process. Why the Boot Device Not Found Error Occurs?
Please install an operating system on your hard disk
When this issue occurs, any of the following error messages may appear on the screen: Several HP and Lenovo users have reported about encountering this error under different circumstances with a different set of measures. The ‘Boot Device Not Found’ error occurs when there is an incorrect boot sequence in the BIOS setup or the system can’t detect the hard disk.