Hi Rachellynnnn, welcome to Sevenforums.
Are you trying this on your wired or wireless connection?
If its on the wired, Open Control panel > Network and Sharing Center > Change adapter settings
Then right click on the network connection and open properties.
Open the properties for IPv4. Are obtain IP and obtain DNS both set to automatic? They should be.
If you have IPv6 enabled, check that out too.
Let us know how you get on.
If it still fails, then it might have to do with the router.
Also, what is the model numbers for the laptop and router?