How To Fix Bootloader In Windows 10

From Windows side you can try follow the step below:

1/ Create installation media and plug on device -> https://www.microsoft.com/en-gb/software-downlo…

2/ Select Command Prompt and type the following commands, then press Enter:

Bootrec / fixmbr
Bootrec / fixboot
Bootrec /rebuildbcd

3/ Close the Command Prompt window, then restart your device.

The Boot Configuration Data file is missing some required information

Actually, the boot record is consists of two files; Boot Configuration Data (BCD) and Master Boot Record (MBR). Thus when you’re not able to boot your system at all, the probability is that either of these two files is corrupted or inaccessible. In such scenario, if you open the Boot Configuration Data using Command Prompt at boot, you’ll see following error:

The boot configuration data store can not be opened.
The requested system device cannot be found.COPY

Now since the boot records are malfunctioned, Windows won’t let you to Refresh or Reset. It’ll keep saying The drive where Windows is installed is locked. Unlock the drive and try again. One easiest fix to sweep out this issue is that you create a bootable Windows installation disk using ISO image of any Windows edition released after Windows 7. Then you have to plug it and using it install the Windows edition on any other partition. In others words, create a dual boot environment. Once you’ve installed a new Windows edition in parallel to original Windows edition whose boot records are compromised, you’ll found that problem is automatically fixed. You can then uninstall the alternative installed Windows so far, and start using your original installation since the issue is resolved.

But if you can’t follow the above mentioned process, here is how to get rid of this issue very easily and repair Master Boot Record.

FIX : Windows 10 Master Boot Record Is Corrupted

1. Boot to Advanced Recovery Options. Hit the Command prompt entry at following screen:

2. Last step will result in opening of Command Prompt at boot.

Select your admin account and enter your select account password to continue.

Then type following command:

chkdsk /rCOPY

After the check disk is completed, you may try booting the computer and check if that resolves the issue. If the issue persists, then try performing a SFC scan using SFC /SCANNOW command to rebuild or recover the corrupted system files on the computer. Still if you’re facing the issue, go to step 3.

3. The last option you can try to repair corrupted boot record is to execute following commands in Command Prompt at boot, press Enter key after each:

bootrec /scanosCOPY

bootrec /fixmbrCOPY

bootrec /fixbootCOPY

bootrec /rebuildbcdCOPY

You’ll receive “The operation completed successfully” message when each command is successfully executed. In case if bootrec /fixboot command gives Access is denied, then refer this fix. Once done, restart your computer and it should boot fine now. This means the MBR is fixed now and you can verify it by executing bcdedit /enum command at Command Prompt. This method is equally helpful to Windows 7, Windows 8 or 8.1 users as well.

Checkout following video to take live demonstration of this trick:

Hope this helps!