I searched alot on how to enable php_fileinfo extension, but here in my php.ini file and it doesn't contain any php_fileinfo thing, I'm using PHP 5.4 on a dedicated windows server.
Should I add a extention = php_fileinfo.dll, will it work?
Adding extension=php_fileinfo.dll
solved the problem! for more information read this article: https://community.xibo.org.uk/t/how-do-i-enable-fileinfo-in-php/78