Woke up this morning with no internet and the error, "Your LAN does not have a valid IP configuration." Okay. So I called Comcast, hoping they could talk me through fixing it. What a bunch of inept retards. "Reboot your router." "I did. 10 times. That alone isn't going to fix it." "Well, everything is working on our end. Call someone else." The HECK? I'm used to making troubleshooting calls to ATP at work, and even though more often than not their customer service sucks, they at least try to help you fix the problem. So, I turned off my modem and my router. Turned my modem back on. Unplugged and reattached my ethernet cable. Unplugged my internet cable. Did that whole ipconfig/release, renew thing. Reattached my internet cable. Rebooted my router. And wahlah! Internet! Screw you, Comcast guy! I am VICTORIOUS.