Hi, a few day ago i bought a wifi modem router netgear n150 and i'm havinh problem with the internet. Before i bought this modem i had the one that my isp gave me and everything worked well. When this problem started the connection would last a little more than an hour. now it lasts 10 minutes. The problem: the browser will behave like there is no internet, but according to windows 8 and the light on the modem the connection is fine. Since when i changed the upnp advertisement period to 1440 minutes the connection started to last less time. To fix the problem i simply disconnect and reconnect again. If i use the diagnose, it will reset the wifi adapter and give me the error "the default gateway is not available". I really hate this. What could it be?