Hi Anil,
About your test page issue is outside of this forum scope, please move to that forum for more professional help:
https://forums.iis.net/
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
About the Windows feature issue, run these command to fix the system file:
sfc /scannow
Dism /Online /Cleanup-Image /RestoreHealth
For more information, please read this article:
Windows Update error 0x80073712
https://support.microsoft.com/en-us/kb/957310
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