XAMPP's default port:80 is occupied by System.exe, so I have to switch to port:81, as this question suggested XAMPP PORT 80 is Busy / EasyPHP error in Apache configuration file:
After this change, I can access localhost:81/xampp and localhost:81/phpMyAdmin , as well as local files, like localhost:81/wordpress/Readme.html
However, I can not load other local directories in htdocs, can not install new wordpress site on my computer, and localhost:81/wordpress is auto referred back to localhost/wordpress , which is NOT FOUND
Here's a list of what I tried and failed
Change all localhost options to locahost:81, in C:\xampp\apache\conf\http.conf , in C:\xampp\xampp-control.ini , in MySQL Database, Database Tables, root User, in wordpress wp-config-sample.php , wp-config.php
I load localhost:81\wordpress in Chrome and it is auto referred back to localhost\wordpress , the result is NOT FOUND.
So I can not access to localhost:81/mywebsite because it is auto referred to the old localhost , and can not stop System.exe from using port:80. I searched almost every where, but the only solution I found is a mistyped mistake in wp-config.php - that is NOT my problem.
Plese help.
I uninstalled ISS , uninstalled XAMPP and reinstall XAMPP again, and it worked with port:80 as default. Thank you all. About the service that occupied port:80, it is answered in this question: windows 8 NT Kernel and System using port 80