Hi Prakhar
Have you created a USB drive form that downloaded ISO file?
If so, boot your PC up form that USB by changing the boot order in BIOS
When that starts up, instead of installing Windows 10, choose 'Repair this Computer'
That will bring you to the the Recovery Environment form the USB, then try each option from there.
Please Note, resetting Windows 10 form there, will allow you to keep your personal files, but not installed Applications
If none of the options work from there, boot from that USB again, do you get the option to upgrade Windows 10, if so, that should keep all your personal files and applications
If none of the above resolves this problem, then the only option is a clean install of Windows 10 and that will not retain your applications or personal data . . .