I have a Motorola/Arris SURFboard Modem and Wi-Fi Router; N200|N300 Dual Band; Model Number: SBG6580. I have had this problem for the past few weeks that started up about a week after we started using the router. I have tried multiple times to unplug the router and let it sit for anywhere from 30 seconds to 15 minutes and it only seems to solve the problem for a few hours at most. The problem is this, when using a Wi-Fi connection on a Windows laptop, Windows Tablet, or a cell phone (both iPhone 5 and Samsung S4), after a few hours the device will be able to connect to the router (phone shows it's connected, laptop shows the 5 bars at the bottom but with a yellow error triangle) but I can not connect to the internet. When looking through the laptop and tablet network map it shows that I am connected to the router but the router is not connected to the internet, and the cellphone doesn't show any problem I am just simply unable to load anything using the internet. However, when I plug in a Ethernet cable to my laptop from the router I can connect to the internet just fine, so I know my router isn't disconnecting from the provider.