Recently my family and I have been having internet connectivity issues and very slow speeds, we all point towards my younger brother since he seems to be the issue. Whenever he turns on his computer/connects to the internet on it everyone's speed significantly drops and most of our devices can't even connect. My brother's phone doesn't even lose speed or has issues. I even started a download that was a steady 30 kbps, then turned off his pc and the connection for everything stopped for a few seconds then the download speed skyrocketed. I tried looking around in our router's (SmartRG SR505N) settings but I don't know were to look, and I haven't been able to check his computer to see if something on there is making this happen. If anyone has info about what is going on that would be much appreciated.