Hmmm, sorry, I'm stumped. If you can access your router page on 192.168.1.1 in internet explorer then no problem in the connection between the router and pc. The only possibilities I can think of now are
1. Wrong DNS numbers, get the correct ones from Customer Care
2. Wrong WAN settings, get the correct settings from Customer Care
3. Faulty cable? Does the Link light glow steadily?
And yes I forgot, you are using Windows

We had an interesting virus once in our college that blocked all outgoing network traffic.