Boot device not found

[Chederve]

I press the power button and it automatically brings me to this black screen that says that boot device is not found and it tells me to go this website but the website did not help can anyone help me please 

[WAWood]

@Chederve 

I read your post about boot device not found.

If you don't have Win10 install media, you will need it to do the repair, so create the media using the instructions in the link: http://windows.microsoft.com/en-us/windows-10/media-creation-tool-install?ocid=ms_wol_win10

Note that when you go do download and build install media, the tool defaults to matching what is already installed on your PC (as in, Home for Home, 64-bit for 64-bit). While you CAN change these settings, do NOT. If you do, the resulting media will be different and will force you to enter a NEW product code!

Once you have the media, try doing a Startup Repair following the instructions in this link:
http://www.windowswally.com/how-to-fix-error-code-0xc0000185/

I know that says Win8, but the steps are the same for Win10.

IF that doesn't work, then you should consider a repair-install. This is the least destructive of all the Windows recovery functions and rewrite the Windows system files, leaving your data, settings, and applications intact. Boot from your Win10 install media and follow the instructions in the link: http://www.tenforums.com/tutorials/16397-repair-install-windows-10-place-upgrade.html

Good Luck