请问版主，我电脑的这个挂马怎样清除？
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>网站访问提示 </title>
<style type="text/css">
<!--
body {
background-color: #FFFFFF;
color: #000000;
font-size: 14px;
line-height: 160%;
}
.big {
font-size: 20px;
font-family: "黑体";
}
.line {
border: 1px dashed #000000;
}
#box {
width: 400px;
margin-right: auto;
margin-left: auto;
background-image: url(http://tool.ikaka.com/img/sz.gif);
background-repeat: no-repeat;
background-position: right center;
}
.content {
padding-top: 10px;
border: 1px dashed #000000;
padding-left: 10px;
padding-bottom: 10px;
width:400px;
}
.text
{
border-width:0px;
float:left;
}
.img
{
border-width:0px;
float:right;
}
.content ul {
MARGIN:0px;PADDING:5px 0px 20px 15px;
}
-->
</style>
</head>
<body>
<div id="box">
<div class="content">
<div class="text">
<p class="big">卡卡上网安全助手提示 </p>
<ul>
您将要访问的网址可能是一个<br>
其他 类型的不良网站。
</ul>
<ol>
<strong><a href="about:blank">返回上一页</a></strong> <strong><a href="http://www.changxianchem.com/">继续访问</a></strong>
</ol>
</div>
<div class="img">
<img src = "RsLion.gif"/>
</div>
</div>
</div>
</body>
</html>
用户系统信息：Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
