为什么打开网页的速度突然变得很慢

我怀疑 你的HOSTS文件没了，打开C:\WINDOWS\system32\drivers\etc，看看有没有HOSTS文件，如果没有，请在C:\WINDOWS\system32\drivers\etc，C:\WINDOWS\system32 两个目录下创建HOSTS.txt,输入以下内容，然后把后缀名删除，加分啊LZ！

# 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

引用请指明！

这个情况我个人建议你最好重新做下系统吧。系统用久了会性能降低。我一般每隔3个月就做一次。
最好别用别的浏览器，因为占用内存会比IE浏览器大得多。

清除一下缓存。。

IE的话：

工具 internet选项 历史记录啊 cookies啊

表单啊之类的都删除一下 就好了

浏览器都差不多的

下载个超级兔子把垃圾文件清理下就好了