针对部分猴子修改Hosts文件后，被警告。
本人发一个Hosts 文件的恢复方法，希望对各位有用！
先打开 C:\WINDOWS\system32\drivers\etc，然后找到hosts文件，
选择打开方式：记事本，把下边这段复制进去，然后保存。
# 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
OK啦！
