最近瑞星一直不能升级，老是提示网络连接失败
后来按照网上方法清理了hosts文件就可以升级了。可是升级过后又不行了
hosts文件被修改为

125.91.14.230 www.kzdh.com
125.91.14.230 www.7255.com
125.91.14.230 www.7322.com
125.91.14.230 www.7939.com
125.91.14.230 www.piaoxue.com
125.91.14.230 www.feixu.net
125.91.14.230 www.6781.com
125.91.14.230 www.7b.com.cn
125.91.14.230 7b.com.cn
125.91.14.230 www.918188.com
125.91.14.230 hao.allxue.com
125.91.14.230 good.allxue.com
125.91.14.230 baby.allxue.com
125.91.14.230 www.allxue.com
125.91.14.230 about.lank.la
125.91.14.230 www.x114x.com
125.91.14.230 www.37ss.com
125.91.14.230 www.7k.cc
125.91.14.230 www.73ss.com
125.91.14.230 www.hao123.com
125.91.14.230 www.81915.com
125.91.14.230 222.88.90.22
125.91.14.230 www.9991.com
125.91.14.230 www.my123.com
125.91.14.230 www.haokan123.com
125.91.14.230 www.5566.net
125.91.14.230 www.gjj.cc
125.91.14.230 www.2345.com
125.91.14.230 dl.hao318.com
125.91.14.230 www.123wa.com
125.91.14.230 www.ku886.com
125.91.14.230 www.5icrack.com
125.91.14.230 www.jjol.cn
127.0.0.1 www.rising.com.cn
127.0.0.1 tool.ikaka.com
127.0.0.1 www.ikaka.com
127.0.0.1 update.rising.com.cn
127.0.0.1 online.rising.com.cn
127.0.0.1 up.rising.com.cn
127.0.0.1 go.rising.com.cn
127.0.0.1 it.rising.com.cn
127.0.0.1 rising.com.cn
127.0.0.1 ikaka.com
我该怎么办呀？