I've just set up a wireless network at our charity office using a Linksys modem router and several different pc & USB cards. Four of the 5 PC's/laptop have connected fine but one, a Toshiba Laptop with built-in wifi connects to the network but Internet Explorer will not connect to any websites - "page not available" etc. I've checked the internet settings and they seeem identical to the other laptops that work. Any ideas? This laptop has a wired network connection to one of the other pc's (this pc connects wirelessly OK) - don't know if this could affect anything?