Windows 10: windows boot manager failed after modifying {bootmgr} from terminal

I did this in the terminal:- bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efiand Windows boot manager isn't working correctly, and I can't boot into windows. After BIOS screen the computer asks me to plug a bootable device. how can I fix it?

:)

 

Problem with Master Boot Record / Windows Boot Manager

Hi Ver0s,

My name is Erik. I'm an Independent Advisor and I'll be glad to help you today.

Kindly try to change system properties to enable or disable Windows Boot Manager. Here are the steps for you.if this will not work go to CMD

Step 1: Open the Run dialog window by pressing Win plus R keys.

Step 2: Type sysdm.cpl and click OK to continue.

Step 3: When the System Properties window pops up, choose the Advanced option. Then click on the Settings under the Startup and Recovery option.

Step 4: In the pop-up window, select the Time to display list of operating systems box and set the time value. After that, click OK to save the changes.

Step 5: If you want to disable BOOTMGR, cancel Time to display list of operating systems box or set the time value as 0 and click OK to finish the operation.

2nd Options

Try to enable/disable Windows boot manager. Used CMD

Step 1: Type cmd in the search box, and then right-click Command Prompt and choose Run as administrator.

Step 2: Type the following commands in the Prompt and hit the Enter key after typing each one command.

bcdedit / set {bootmgr} displaybootmenu yes

bcdedit / set {bootmgr} timeout 30

Tip: The timeout decides the time of the boot manager displayed. You are able to specify the timeout value in seconds based on your requirement.

Step 3: If you want to disable Windows Boot Manager, you need to type bcdedit / set {bootmgr} timeout 0 and hit Enter.

Please let me know if you have any further concerns.

Regards,

Erik

Independent Advisor

 

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
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)

 

Windows 10 PC Fails after Latest Windows update

Hey Thanks for your Suggestion: -

I ran ecdedit /enum

It lists the settings what I have noted is without trying ti list all the data:

Windows Boot Manager

---------------------------

identifier {bootmgr}

device partition=C:

description Windows Boot Manager

Further Down

Windows Boot Laoder

---------------------------

identifier {default}

device partition=C:

path \WINDOWS\system32\winload.exe