title: Oracle 12c login credentials for windows built-in user account
body: <p>J just installed a new copy of Oracle Database 12c Enterprise Edition with following basic install time settings:</p>
  
  <ul>
  <li>Skip software updates</li>
  <li>install database software only</li>
  <li>single instance database installation</li>
  <li>English language</li>
  <li>Enterprise edition</li>
  <li>use windows built-in account</li>
  <li>install path: C:\Oracle\</li>
  </ul>
  
  <p>The installation went smoth without any critical warnings or errors.
  After installation when I start SQL*Plus command line it requires me </p>
  
  <pre><code>User Name:
  Password:
  </code></pre>
  
  <p>I have not specified any of these during installation. S, what could probably be the credentials?
  I tried using my windows log-in user &amp; password to login (Nte: My windows log-in name has a white space in middle as: FirstName LastName) but it issued me an ERROR message as:</p>
  
  <pre><code>Enter user-name: ******* ********
  SP2-0306: Invalid option.
  Usage: CONN[ECT] [{logon|/|proxy} [AS {SYSDBA|SYSOPER|SYSASM|SYSBACKUP|SYSDG|SYSKM}] [edition=value]]
  where &lt;logon&gt; ::= &lt;username&gt;[/&lt;password&gt;][@&lt;connect_identifier&gt;]
        &lt;proxy&gt; ::= &lt;proxyuser&gt;[&lt;username&gt;][/&lt;password&gt;][@&lt;connect_identifier&gt;]
  </code></pre>
  
  <p>Then I tried using same user name without white space but got another Error message as:</p>
  
  <pre><code>Enter user-name: ***************
  Enter password:******
  ERROR:
  ORA-12560: TNS:protocol adapter error
  </code></pre>
  
  <p>Is there anywhere I am going wrong? Please suggest me the solution
  Thanks...</p>