Alienware 14 stalls after some minutes of using wifi

Hello, I'm having a problem with my Alienware 14 Laptop (2013 model). The problem is, when I'm on wifi and browsing the Internet or watching a movie on Netflix, or using Skype, after some minutes the connection stalls and it seems I am not connected anymore. This doesn't happen with all wifi  routers, just some of them. What I have to do is disconnect and connect again to get it working. It is weird because I have a tablet and a phone and that doesn't happen to them. I also can't play games online because of this. The computer came with Qualcomm LAN Killer E2201, and I have the most up to date driver available. Please help! It is very frustrating...