Hi, Bala,
Sorry to hear you're experiencing this issue.
Error 0xc0000185 means that the boot files are corrupted. You will need to use another computer to create a bootable USB with the Windows installation and use it to repair the boot file from your computer.
1-Create a USB device with an installation image.
You can create using the media creation tool, download it on this link.
https://www.microsoft.com/en-us/software-downlo...
2-Enter on BIOS/UEFI and change to boot from the USB device.
3-On the installation screen click on "Repair your PC" in the bottom left
4-Click on "Troubleshoot" and then the Advanced Options page will appear.
5-Click on "Command Prompt".
6-Run these commands.
chkdsk c: /f /r (and press Enter)
sfc /scannow (and press Enter)
diskpart (and press Enter)
sel disk 0 (and press Enter)
list vol (and press Enter)
7-Verify that the EFI partition (EPS) is using the FAT32 file system and assign a drive letter to it that is not already in use:
sel vol <number of volume> (and press Enter)
assign letter=Z: (and press Enter)
exit (and press Enter)
8-In order to repair the boot record:
cd /d Z:\EFI\Microsoft\Boot\ (and press Enter)
bootrec /FixBoot (and press Enter)
ren BCD BCD.old (and press Enter)
bcdboot c:\Windows /l en-us /s <boot letter>: All (and press Enter)
(Note: The <boot letter> is replaced with the letter of the drive that you are booting from. (For example, C:, D:)
9-When finished close the command and reboot your PC
If you receive any error message, take a photo and attach it here to help identify what is causing the problem. You can see at this link how to include a screenshot in your post.