title: TNS Protocol adapter error while starting Oracle SQL*Plus
body: <p>Whenever I try to login into SQL*Plus (11g Standar Edition Win 64) I get an error related to some connection error.</p>
  
  <p>I try to login as sys as sysdba and provide the password. </p>
  
  <p>All the services are started. I'm on Windows 7.</p>
  
  <p>Any help would be appreciated.</p>
  
  <p><img src="https://i.stack.imgur.com/9byNL.png" alt="enter image description here"></p>