I have had a wireless network in my house for about a year. I have a linksys router and belkin wireless card in my laptop. For the past few weeks, my laptop wireless will stop working after about 20 minutes. The pages will not load. The computer shows that it is still connected to the internet, but nothing on the internet will load. I can restart the laptop and the connection works again. Is there something that could be causing this problem? I have not installed any new programs and i do not have any viruses on the system. My desktop is connected the the router with rj45 cable and does not have this problem.