title: How to delete Oracle 11g driver
body: <p>I have remove the oracle 11g (following <a href="https://stackoverflow.com/questions/83967/how-do-i-do-a-manual-uninstall-of-oracle">How do I do a manual uninstall of Oracle?</a>)
  Then install the oracle 12</p>
  <p>However, I'm getting a ORA-12560: TNS:protocol adapter error, when I'm using new oracle.
  Its look like there are still some references to old oracle.</p>
  <p><a href="https://i.stack.imgur.com/r5zpl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/r5zpl.png" alt="enter image description here" /></a>
  As per picture above, how do I delete oraclient11g_home1 in windows?</p>