I got a new laptop over the holidays, running Win8 (ugh), and I've only had a couple chances to take it out surfing. It connects without much fuss to one local network, but absolutely refuses to connect to any others. I keep getting 'Limited Connectivity' notices and 'WiFi doesn't have a valid ip configuration' messages. I've un/re-installed all of my AV and firewall software, gone through my ip settings, run troubleshooter, and nothing works. And I don't think the problem is the WiFi, because I'm at a hotspot right now and my phone connects without a problem.