404 after extraction

I just followed this tutorial step-by-step

Install WordPress Locally for Windows with XAMPP

However, on the step that I need to open this http://localhost:81/wpress/ it always gives me webpage not available.

Screenshot

Here’s my detail:
XAMPP Control Panel v3.2.1
PHP Version 5.6.3
Wordpress 4.1

note:
apache works fine with port 81 and 443. I find it weird that http://localhost:81/wpress/wp-admin/install.php doesn’t work even if the install.php is present in that folder.