Norton does this when it expires and there is malware we see that does this. ALL details are needed in order to avoid a lot of blind alleys.
But try the usual with NETSH RESET (add which version of Windows as I can't find it in your post.)
I've got a Gateway M16 Laptop that is unable to connect to the internet. It sees wireless networks and says that it is connected to the internet, but neither Chrome, Firefox or Explorer can connect.
I've also tried connecting directly with a LAN line with no luck.
Thinking it was a bad network card I attempted a workaround by attaching a USB WiFi connector but this gave the same results, showing a network with an active internet connection, but no ability to connect with any program.