This is just about the fastest I've ever been baffled by a computer issue. Tonight my computer crashed, as it does most nights (a separate problem that I'm still working on). But this time when it restarted, I found that I had no internet. I also couldn't connect to my router by entering its IP address. The networking troubleshooter in the system tray insists that the cable is unplugged, which of course is not true. I know it's a software issue because I happen to have a portable Ubuntu distro lying around, and the connection works fine in that. I also have a wireless networking card installed, and I can connect using that. So far I've uninstalled and reinstalled the network adaptor, which is about the only thing I can think to do. I have no idea if it's related, but the only difference when the computer crashed this time was that I had an instance of TeamViewer running because I was about to give remote assistance to my parents for an issue of their own. This has not been a good night.