Their own home wireless router, mobile phones and laptops are used normally, but a new laptop connected after the always prompt "limited access to ask permission", can not connect the public network.
There are a lot of ways to use the Internet, what to set up static IP or restart the route, basically is nonsense.
Fortunately an article saved me: http://wenku.baidu.com/view/0e59cf235901020207409c99.html
But my approach, in contrast to this article, is to disable network-aware functionality.
Detailed steps such as the following:
Click the Start button, enter "Gpedit.msc" in the Command box, press ENTER, turn on the computer Configuration-"Management module-" System-"Internet communication settings-" Internet communications settings, double-click "Turn off the Windows Network Connection Status indicator activity test" , select "Disabled" and click OK button to exit.
Disconnect the wireless network connection again, everything's fine.
Win7 WiFi no Internet access or limited access