Anyway, I'm running Windows XP and connecting to a Netgear router wirelessly through a D-Link wireless card. Let me preface this by saying my problem does not occur with other computers connected to my network, and it still occurs when my computer 'borrows' a different network from within my building, so it seems obvious the problem is localized to my PC.
What happens is that, when I connect to my wireless network, everything is cool for about 60-90 seconds. I can connect, do whatever I please. But after that, I can't connect to webpages - either through IE or Firefox. The problem is not that connectivity to the internet is lost completely, because I can still use Instant Messenger. Even right now, I'm at work and can remote to my desktop at home using VNC, so obviously it's online, but the pages still won't load. When I try it seems like it doesn't even try to search, it just goes immediately to "the requested page cannot be found.
When I repair the connection or connect to a different network, the cycle begins again, 60-90 seconds of goodness, and then webpages don't work.
If anyone has any insight it'd be much appreciated.. thanks!