Hello Rajiv Kalra,
Since you have already completed some troubleshooting without success, I would suspect 2 reasons:
- Network connection: Ensure that there is no Firewall blocking the connection to Windows Update, or in case, that there is a proxy configuration that is affecting the external connection to internet resources.
- Perform a Clean Boot to discard 3rd Party apps or services interfering:
- Perform a Clean Boot: https://support.microsoft.com/en-us/topic/how-to-perform-a-clean-boot-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd
- Reset Windows Update components based on the next Microsoft Official article:
- Perform a DISM health check and repair: https://video2.skills-academy.com/en-us/windows-hardware/manufacture/desktop/repair-a-windows-image?view=windows-11
--If the reply is helpful, please Upvote and Accept as answer--