情况一：Hosts文件被篡改；Hosts文件存放位置：C:\Windows\System32\drivers\etc\hosts
0. 请注意，请确保hosts文件未被隐藏；
在【控制面板】--【文件夹选项】--【查看】--勾选 显示隐藏文件、文件夹。
确保在 etc文件夹中看到所有的文件（包括隐藏文件）。
1. 用记事本打开hosts这个文件
2. 打开后，如果看到如下异常hosts文档：如果hosts文件如下所示，最底下有很多网站，前面是 127.0.0.1，那说明您的hosts文件被修改，导致上网异常；
3. 您只需Hosts中所有代码删掉清除，将下面文档复制进去后保存即可：#Copyright (c) 1993-2009 Microsoft Corp.##This is a sample HOSTS file used by Microsoft TCP/IP for Windows.##This file contains the mappings of IP addresses to host names. Each#entry should be kept on an individual line. The IP address should#be placed in the first column followed by the corresponding host name.#The IP address and the host name should be separated by at least one#space.##Additionally, comments (such as these) may be inserted on individual#lines or following the machine name denoted by a '#' symbol.##For example:## 102.54.94.97 rhino.acme.com # source server# 38.25.63.10 x.acme.com # x client host#localhost name resolution is handled within DNS itself.# 127.0.0.1 localhost# ::1 localhost4. 修复之后，关闭浏览器，重新打开360导航hao.360.cn，看下小黄条是否消失，如果未消失请参考情况二
0. 请注意，请确保hosts文件未被隐藏；
在【控制面板】--【文件夹选项】--【查看】--勾选 显示隐藏文件、文件夹。
确保在 etc文件夹中看到所有的文件（包括隐藏文件）。
1. 用记事本打开hosts这个文件
2. 打开后，如果看到如下异常hosts文档：如果hosts文件如下所示，最底下有很多网站，前面是 127.0.0.1，那说明您的hosts文件被修改，导致上网异常；
3. 您只需Hosts中所有代码删掉清除，将下面文档复制进去后保存即可：#Copyright (c) 1993-2009 Microsoft Corp.##This is a sample HOSTS file used by Microsoft TCP/IP for Windows.##This file contains the mappings of IP addresses to host names. Each#entry should be kept on an individual line. The IP address should#be placed in the first column followed by the corresponding host name.#The IP address and the host name should be separated by at least one#space.##Additionally, comments (such as these) may be inserted on individual#lines or following the machine name denoted by a '#' symbol.##For example:## 102.54.94.97 rhino.acme.com # source server# 38.25.63.10 x.acme.com # x client host#localhost name resolution is handled within DNS itself.# 127.0.0.1 localhost# ::1 localhost4. 修复之后，关闭浏览器，重新打开360导航hao.360.cn，看下小黄条是否消失，如果未消失请参考情况二
