I just bought a toshiba satellite with windows 7 factory installed. It has a realtek 8191SE card and I'm not able to get into the internet through my linksys wireless G router. I have no issues with XP on my desktop and I'm unable to access my router through IP adress to update firmware if that's the issue. The error I get is "wireless Network connection" doesn't have a valid IP configuration. DHCP is enabled on the router. Side note: I'm not able to connect with Cat5 cable directly to cable modem, I get the same problem. I've noticed similar problems on many forums but could not find any answer that worked. Any help would be greatly appreciated.