My router is connected to my pc. i also have a

You will need to check your IP address first to see if you have all of the connections. Do this then post your results: Click on start>run>then type cmd. This will get you to the DOS prompt. Then type c:>ipconfig /all
You are looking for two addresses the Gateway address (that is your router) and the DHCP address that is your computers ID. If one of them is missing then the problem lies at your Internet provider not your router. Check if all of your lights are yellow on your router. If one of them is orange then its your Internet Provider. Good luck. Post the two addresses if everything checks out ok.