Unidentified network in Widnows 7 Vista

Ever wondered why your home wireless network stops working when you make a business trip or connect to a public network. After some painful research I found the answer from Microsoft Blog..
- If you are technical user - Run a command prompt as an administrator then type
c:\windows\system32> netsh int tcp set global autotuninglevel=disabled
at your prompt. ou should get a OK response. reboot and then this Unidentified network problem will go away...