求救PS序列号问题

我按照网上说的在C:\WINDOWS\system32\drivers\etc\hosts 目录下添加了一个文件。结果就打不开了！！怎么改，谁能把PS C:\WINDOWS\system32\drivers\etc\hosts文件全部发给我看下！！我把它改回来

直接找个可以注册不就行了吗。。。。。不懂。。不过我的hosts文件用笔记本打开是这样的

# 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
127.0.0.1 activate.adobe.com