Windows 10: Windows boot manager boot failed

im in the slow ring for win10 creator updates. every few weeks I get new version to install. but the last one broke my pc and got me to this boot failure message. I pressed ok few times and then OneKey recovery showed up and asked me if I want to restore my pc to its initial stateand lose all my data. I pulled my HDD out and made a backup then I used the restore option which brought me to win 8.1 as out-of-box.

then I downloaded win10 media creation tool from here: https://www.microsoft.com/en-in/software-download/windows10.

I followed the steps. it downloaded win10 and then ask me whether to keep my file or not. I chose save ''nothing'' then the pc did a restart and started the installation procces. once it finished it did some restart and again the "windows boot manager boot failed" showed up again.

is there anything I can do further?

thank you.

my pc: Lenovo g50 i7 5500

:)

 

Windows boot manager

There could be some system conflict triggered after the said changes. To help you with your concern, we suggest that you perform a clean boot. A
clean boot is performed to start Windows by using a minimal set of drivers and startup programs. This will help to determine what is causing the issue on the Windows boot manager. To do this, click on this
link and scroll down to the
How to determine what is causing the problem by performing a clean boot section then follow the steps listed..

Note: If the installation is successful and the issue has been resolved. Please go through the section “How to reset the computer to start as usual” to reset your computer to the normal startup.

Let us know how it goes after performing the suggested steps.

 

Boot Manager Is Missing

You need to use the Bootrec.exe tool in the Windows Recovery Environment. For that you need to boot into Recovery Environment and perform a "Startup Repair". If that fails then boot into WinRE again, and go to the "Command Prompt" and execute this command:

Bootrec.exe /RebuildBcd

Restore boot manager when it is missing or compressed – Smallvoid.com
http://support.microsoft.com/kb/927392


You can look here too

http://www.howtogeek.com/howto/wind...ing-error-while-trying-to-boot-windows-vista/

(indeed you need a windows dvd)

 

Quad booting

I would use Grub if I were you to.manage the OS boot list rather than Windows boot manager. I've had much better luck over the years that way...more stable, easier to fix, easy to modify.