Delete the comments.php file in both your theme and the default theme (if both are present).
The option setting doesn’t work retroactively. Posts published before unchecking that box will still have the comments open.
Note that that will also remove trackbacks — so leave wp-trackback.php in place if you don’t intend to disable them as well.
I deleted all the recommended files, well, renamed them by changing their extension, but it didn’t work, “leave comments” is still available for users…
Just modify the theme file – post.php
You can easily go into your index.php and single.php files in your theme folder and comment-out or delete altogether the tags that call up the comment link.
1. Open index.php and look for:
<?php comments_popup_link(); ?>
2. You can comment out the result of the function by placing comment tags around it:
<!-- <?php comments_popup_link(); ?> -->
or you can just delete the tag altogether.
3. Look in your single.php file and look for:
<?php comments_template(); ?>
and you can comment-out that tag or delete it as well.
That should be all the instances of your comments tags. I hope that helps.
The proper way to comment out a PHP tag is “//”
<?php //comments_popup_link(); ?>