找到hosts文件，其中有两种方法：
一是通过路径查找：
c：\windows\system32\drivers\etc
二是通过运行(快捷键Win+R)输入“路径”查找。
进入文件夹以后，找到hosts文件，如果打开为空，则复制以下内容保存即可。(如果出现不能编辑的情况，先把hosts文件复制到桌面，修改保存以后，在复制回到该路径下)
# Copyright (c) 1993-1999 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
127.0.0.1 localhost
