CodeIgniter: accessing http://localhost/ needs to display codeigniter welcome page

Question

I just installed CodeIgniter 3 in my wamp64/www/ directory. When I access http://localhost/CodeIgniter/ I can view the Welcome page of CI. I set my base_url = "http://localhost/CodeIgniter". Instead of displaying the Welcome page of CI when I try accessing the "http://localhost/", the browser still displays the WAMP dashboard. I already changed the document root and directory of my apache's httpd.conf to "D:\wamp64\www\CodeIgniter". The viewing of WAMP Dashboard still persist when I access "http://localhost/" on my browser

Can anyone help me on this?

$config['base_url'] = 'http://localhost/CodeIgniter/';


DocumentRoot "D:\wamp64\www\CodeIgniter"
<Directory "D:\wamp64\www\CodeIgniter">