I have one question for you, do you use any firewall ? and do you running a virus protection on your computere, if you have a firewall, then try disable it. Still the same problem? And as i saw people talked about ipconfig /renew. But no one told you how to do so. In menu Run in windows, type cmd <press enter>, a black window pops up, there you type ipconfig -release all .. then you try write ipconfig renew . ipconfig would show you some information about your IP and connection. good luck..