It sounds like the router is in 802.11n mode which can be trouble at times. Did you try the 5GHz channel or try 802.11g mode. This and more at link to follow.
I have HughesNet satellite modem service. If I have the modem connected directly to my W8 Gateway new computer, I have no issues with the connection. However, when I have company here who have wi-fi type devices (Ipads, cellphones, etc) and I connect my computer via the wireless router instead, their devices have no issues connecting to the internet or texting, but my Gateway W8/IE service loses the network connection frequently and I get a window (after the normal 'page cannot be found' error) that has a link to reset the router. Once that happens and everything is back on track, the Gateway will work correctly again for an hour or two and then it will happen again.
I've got a Belkin 3937 router that is only about six months old and cannot for the life of me figure out why it loses the connection on the Gateway frequently but no other devices. I've gotten to the point where as soon as my company leaves, I disconnect the route and again have a wired connection from the computer to the modem just to stop the aggravation.