Norton, other security suites block connections when they expire, there are "Hotspot Shields" that folk or malware installs so there's that.
It sounds like it connected fine with the router but it's one of the other issues. Not a WiFi router one.
Bob
I am having a strange problem with my home network. I am using D-Link DIR 615 WIFI router and our using a cable broadband service. Couple of Smart phones, Samsung Tablet, Lenovo Ideapad and a desk top computer is connected with that Network. How ever i am unable to connect my Toshiba U840 Ultra book with said Wifi router. It says no internet access every time i try to connect it over the wifi but if i use a Ethernet cable it works fine. I have upgrade software on my wifi router and on Ultrabook as well. But no use.

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