Begining of installation procedure - Main configuration
Open your web browser and navigate to the folder that you uploaded your package to. Your url might look like this http://www.mysite.com/joomla/index.php.
First please choose the language, then fill out all requred filds.
Due to security reasons as a user name we recommend other name than 'admin'. Click 'Next' button.

But

Deprecated: iconv_set_encoding(): Use of iconv.internal_encoding is deprecated in C:\xampp\htdocs\keelunggang\libraries\joomla\string\string.php on line 27

Deprecated: iconv_set_encoding(): Use of iconv.input_encoding is deprecated in C:\xampp\htdocs\keelunggang\libraries\joomla\string\string.php on line 28

Deprecated: iconv_set_encoding(): Use of iconv.output_encoding is deprecated in C:\xampp\htdocs\keelunggang\libraries\joomla\string\string.php on line 29

How can I do?