Hi Yashawanthraj S,
Please clear the Windows Update cache by running following commands on Command Prompt (Run as administrator):
net stop wuauserv
net stop bits
net stop cryptsvc
ren %systemroot%\softwaredistribution softwaredistribution.bak
ren %systemroot%\system32\catroot2 catroot2.bak
net start cryptsvc
net start bits
net start wuauserv
To make sure, you may restart your computer after those commands run successfully then open Windows Update again.
You may also follow this article to run the Windows update troubleshooter: Windows Update Troubleshooter - Microsoft Support.
If you have further information, please feel free to let me know.