I have 4 computers successfully connected to the internet via a D-Link router. But suddenly yesterday 1 of my computers couldn't connect to the internet anymore. I have verified that the PCI wireless antennae still works by switching it to another computer, but when I open Network Connections from the control panel, there is no internet gateway. I have run tons of virus scanners and the like, but the problem persists. If anyone can give me any suggestions, I'd be grateful.