Take the laptop to a wifi hotspot and retest.
Be sure to start with router defaults and don't turn off SSID broadcast. While a common security advice it's been found to create trouble for some.
In closing, no spyware please.
When I am on the computer (Dell Dimension L800) , I can work for about 5 minutes at a time before pages stop responding no matter which browser I am using. I am using a Belkin USB wireless connector to connect to my Apple Airport Express hub. I tried running the Ethernet cord directly from my Vonage router as well with the same results. Could this be ME, the Vonage router, or the Apple Airport express? Thanks in Advance.