Can't seem to connect

So this is the most odd issue I have ever had. I have a dell laptop that has recently become very hit and miss when connecting to our wireless internet. I have connection to the network, it says "Connected" and I have "Internet Access" but I cannot connect to any web pages. This happens very infrequently. One day it works with no issues and then all of sudden it just won't connect, despite it saying I am connected and have access. Any ideas?

thank you for your time and help with this :)