My main desktop has decided it won't be friends with the router. I was on the net, went downstairs, came back up and... the net wouldn't work. So I go to the router control panel... except it won't. So I restart the router manually, but that makes no difference (although it did tell me I reconnected to the network). All the other devices in the house are having no trouble (Xbox, this laptop, another laptop) and I can get into the control panel on those, but I have no idea what might need changing there.
The weirdest bit is that the activity light for the connection on the router (D-link DSL-G604T) not only says the PC is connected, but is flashing as if it is doing something. Which it isn't.
I've attempted all the basics I can think of (restarting various things, unplugging various cables etc) but all to no avail. Windows also refuses to repair the connection, if that helps. (can't find a new IP)
I have no idea what to do here, networking is something I have nearly zero knowledge on so help would be appriciated greatly!
EDIT: The PC now won't connect to the network. The router STILL has the activity light going though.
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If that doesn't work, maybe uninstall/reinstall the NIC drivers.
From what the OP said, he can not repair the connection, so it doesn't sound like he able to pull DHCP. Its possible there is a static IP in there, but I doubt something like that happened to him while he walked downstairs.