Hi, Sorry for the late response. I did few more tests and found issues with Windows 10 os. Tried to fix the issues using MS KB article however they didn't help me much. Really not sure if third-party antivirus software avg or Avast caused an issue to the virtualization feature of Windows defender. I reinstalled Windows 10 OS and I am able to get the nested virtualization working fine on my new coffee lake i7 8700 processor.
Thanks,
Murali