Hello Vivekhpe, welcome to the Microsoft community, my name is Luiz Cruz, an independent consultant and I would be happy to help you.
For this problem the solution will be to perform the repair using a Windows 10 media on USB stick;
If you do not have a Windows 10 media on a USB stick, I will send the procedure for creating the media on the USB stick:
Note:If you do not have access to your computer, you will have to do this procedure of creating the media on another computer;
Download the tool according to the Windows 10 architecture installed here:https://go.microsoft.com/fwlink/?LinkId=691209
Run the downloaded setup and click Create installation media for another computer;
Select the Language, then select the edition and architecture according to the installed Windows 10;
Connect the Pen Drive;
Click Next;
Select the USB Flash Drive option and click Next;
Click Finish;
Now with Windows 10 on the USB stick, proceed to the instructions below:
Boot with the Pen Drive;
When the installation window appears, click Repair your computer;
Click Troubleshooting> Advanced Options;
Among the options presented, follow the procedures below:
Access the System in Safe Mode (Diagnostic Mode):
Click Troubleshooting> Advanced Options> Startup Settings> click Restart> press the 5 or F5 key to access Safe Mode with Networking.
Redoing the Windows 10 startup files:
Click on Troubleshooting> Advanced Options> Command Prompt> enter your Account and enter the commands:
CHKDSK /R /F X: [Enter]
Bootrec /Scanos [Enter]
Bootrec /Rebuildbcd [Enter]
Bootrec /Fixmbr [Enter]
Bootrec /Fixboot [Enter]
Restore the System by deleting everything:
Troubleshooting> Restore your PC> Remove Everything.
Note: Before performing the Restore System procedure by deleting everything, we advise you to make a backup of your data. You can connect your hard drive to another computer and transfer your personal files.
If you do not resolve this way, the solution will be to perform a clean installation of Windows 10;
I hope this helps, even more!