方法一：

https://support.microsoft.com/zh-cn/topic/%E5%A6%82%E4%BD%95%E5%B0%86%E4%B8%BB%E6%9C%BA%E6%96%87%E4%BB%B6%E9%87%8D%E7%BD%AE%E5%9B%9E%E9%BB%98%E8%AE%A4%E5%80%BC-c2a43f9d-e176-c6f3-e4ef-3500277a6dae

方法二：

1、Win+s搜索cmd，右鍵以管理員身份打開

2、復(fù)制>粘貼>回車

for /f %P in ('dir %windir%\WinSxS\hosts /b /s') do copy %P %windir%\System32\drivers\etc & echo %P & Notepad %P

hosts默認(rèn)如下：

# 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? ? ? ? ? ? ?localhost