My laptop is showing it is connected to the router but no internet works. Mac / IP filtering is off. I tried re-configuring the router, resetting my pc, uninstalling drivers and again installing but that doesnt help. Connecting via lan with the router also denies internet from working. My laptop works fine while connecting to other networks. Internet works though when less devices are connected in the network. As soon as other devices are connected my internet stops working. What could be the problem and how can I fix it?