Internet Information Services (IIS) fail to start webserver - HRESULT : 0x80070020


I faced the above issue In my case it was Skype.

I did the following to resolve it.

Steps to change the setting in Skype

  1. Tools -> Options -> Advanced -> Connection and un-check 'Use port 80 and 443 as alternatives for incoming connections'. 
  2. Restart Skype.