Hi @adarsh2999 ,
Try a Startup repair and see if that fixes it
If you have Win 10 installed try getting into the '''W'''indows '''R'''ecovery '''E'''nvironment to see if you can repair the startup.
To get into WRE start the laptop and when it starts to boot into Windows, force stop the laptop by holding the Power button until it shuts down.
Do this 3 times i.e. start > boot > force shutdown > start > boot > force shutdown etc.
On the 3rd attempt it should boot into the WRE.
Select ''Troubleshooting > Advanced > Startup Repair'' and follow the prompts.
'''DO NOT''' select ''Reset this PC'' because if you select the wrong option after this it will re install Windows and erase all your data.
If you cannot get into WRE for whatever reason, have you got a Windows Recovery USB?
If not you can create one from any known working Win 10 computer. All you need is an 8GB USB flashdrive and 40-60 minutes of time. In the "host" computer go to ''Control Panel > Recovery'' > ''create a recovery drive''
When you have the USB recovery drive, insert it into the laptop, start the laptop and then alter the boot options to boot from the USB drive as first boot option (not sure but it may be Esc then F9, check your user guide). Then restart the laptop. If it doesn't boot from the USB you have to go into BIOS (press Esc then F10 on startup) and disable Secure Boot and enable USB legacy support save the changes and restart the laptop.
It will boot into the WRE so perform the repair as shown above