I think I figured out the problem, but I did not figured out the solution, and this is where I need assistance.
I erased wordpress and the DB and all the new site that Jon was teaching.
I reinstalled wordpress.
This is the problem I noticed:
When my permalink is at default: http://localhost/wordpress/?p=123, I am able to view the site [http://localhost/wordpress/] and successfully click the tabs [about, author, etc' ...].
However, when I change the permalink to any other setting, I am still able to go into the main site [http://localhost/wordpress/], but the minute I click any tab, it comes back with an error:
Not Found
The requested URL /wordpress/about/ was not found on this server.
This is the same error I originally complained about!
I went through Stefan's class 'word press config part 3' [which is free]: "http://www.killersites.com/wordpress/videos/config-wordpress-29-part3.php", and after ~6min, he says there that in order for the permalinks to work, a file by the name of .htaccess needs to be created and edited.
This is my .htaccess [which was created automatically by WordPress]:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wordpress/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wordpress/index.php [L]
</IfModule>
# END WordPress
Any suggestions of what do I need to do in the file (or elsewhere) to fix this problem?
Thank you.