My network drops typically at the 1 hour mark when flying on VATSIM, and the router is ok, because all I have to do is reconnect, nothing else. I changed computers once. Only similarity is that both use the Dell 1397 Wi-fi card. Drivers are up to date. I don't know what's causing it. I changed OS's too. From WinXP to Win7. No use. I have other computers on the network but I never to online simming on them so I don't know. The router is a Linksys WRT54GP2. And I donwloaded things by the GB before, doesn't seem to be a problem there.
I'm pretty sure it's not a loopback adaptor, and I did a