今天办公突然发现windows7网络链接有问题了，检查网线，网线接口都没有问题，那肯定出在操作系统这边，
网络诊断提示:
1 | Local Area Connection doesn't have a valid IP configuration |
莫名其妙，google一下，发现有些干货，真的很给力，解决了问题，这样你就不用苦恼的重装系统了（最笨最郁闷的方法）
帖子内容如下：（黑体字体部分就是解决方法）
Hey everyone, I’ve had this problem for days with my home router on windows7. Try these two commands and restart. it worked for me.
Link of Website is below also.
- Reset WinSock and TCP/IP Stack
Open a Command Prompt as administrator:
Reset WINSOCK entries:
Reset TCP/IP stack:netsh winsock reset catalog
Reboot the machinenetsh int ip reset reset.log
(you can run both commands first, I tend to put multiple commands in notepad and then copy and paste into the command window).
I can also confirm that this is the only solution that worked for me. I entered the second command and rebooted computer. Upon restart my internet functionality was returned.
You can find the original article on the microsoft website at: http://support.microsoft.com/kb/299357
感谢分享，世界才变得更美好。
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