Sam has tried replacing drivers, restarting the router and modem and even bypassing the router and connecting directly to the modem. Leo concludes that there's something wrong with software on the laptop, and is most likely a Windows issue. He says it could either be security software that's blocking the connection or a virus that's doing it. Leo first recommends disabling his McAfee antivirus. It could be that the antivirus is being overzealous and is cutting out wireless activity.