I have an internet connection connected using my router D-Link 2730U.
I use wired connection (LAN) for connecting. All lights, including Power,LAN, DSL, and internet glow on the router. The small Network Access icon on the task bar shows that the computer has internet access. But I will still not be able to connect.
Then if I switch off the router, turn it on again, wait for all the lights to come, then I will be able to connect to the internet.
But then if I again switch off the router and turn it on, I wont be able to connect.