Looks like my McAfee or Windows Update has tweaked my system files. Initially the hosts file was empty and I fixed it.
Now, several sub-folders like Packages and PackageDetect etc were missing under Component Based Servicing(CBS) in Registry. I ran System Readiness Tool and CheckSUR.log says that Failed to detect those folders or something like that.
My OS is Windows 7 Home Premium 64bit.
Please pour in thoughts on how to fix this problem without have to Repair Install
Thanks in Advance