I have comcast high speed internet attached through the modem to a Netgear router. I connect my computer by ethernet cable to the router and my wife connects wirelessly. Everything works perfectly until my son comes home from college and tries to connect his computer either by wire or wirelessly. He immediately connects and gets internet but in the process my wife and my computers get kicked off and we can't reconnect until he disconnects. Any ideas what's going on?

Don't netgear routers have a setting to allow one PC to have 100% bandwidth,?

I would check in the router settings for this, sorry i can't be anymore specific