有些病毒会使用一些手段劫持用户，使用户无法打开瑞星官网或者是使瑞星用户无法升级瑞星。
所以针对这个情况，给出一个解决命令。希望能帮到有需要的会员。
如果遇到打不开卡卡网或者是升级瑞星提示12007错误等情况，可以使用下面的程序：
title 修复瑞星网站打不开程序
net stop dhcp
net start dhcp
net stop dnscache
net start dnscache
echo 如果要删除hosts文件请按回车——》
pause
attrib -s -r -h C:\WINDOWS\system32\drivers\etc\hosts
ren C:\WINDOWS\system32\drivers\etc\hosts host__bak
cd C:\WINDOWS\system32\drivers\etc\
echo # Copyright (c) 1993-1999 Microsoft Corp.>>hosts
echo #>>hosts
echo # This is a sample HOSTS file used by Microsoft TCP/IP for Windows.>>hosts
echo #>>hosts
echo # This file contains the mappings of IP addresses to host names. Each>>hosts
echo # entry should be kept on an individual line. The IP address should>>hosts
echo # be placed in the first column followed by the corresponding host name.>>hosts
echo # The IP address and the host name should be separated by at least one>>hosts
echo # space.>>hosts
echo #>>hosts
echo # Additionally, comments (such as these) may be inserted on individual>>hosts
echo # lines or following the machine name denoted by a 'echo #' symbol.>>hosts
echo #>>hosts
echo # For example:>>hosts
echo #>>hosts
echo # 102.54.94.97 rhino.acme.com echo # source server>>hosts
echo # 38.25.63.10 x.acme.com echo # x client host>>hosts
color 0f
echo HOSTS文件删除重建完成。。如果没有解决，请检查：IE——属性——连接——局域网设置
echo 去掉[代理服务器]和[使用自动配置脚本]的勾
pause
程序在附件中也发了一份。双击运行即可。
用户系统信息：Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 1.1.4322)附件:
修复.rar