Wow, thanks for ignoring me. I really appreciate it. Fortunately I managed to fix the issue on my own.Your site listed an a driver update so I installed it-and it promptly uninstalled the driver for my network controller. Great job Dell!  I was able to connect to the net via Ethernet and re-install the driver, and my internet connection has been perfect ever since. Again though, thanks for ignoring my post. 
I got my Inspiron 7000 literally an hour ago (15 inch model, i7core, 1TB HD 8GB RAM). It's nice but the WiFi is sickening. It keeps dropping the internet connection and every time I run troubleshooting it gives me a different problem that it fixed. First it was a problem with the WiFi adapter, then "Default gateway was unavailable".  This is unacceptable. I work at home and need a SOLID connection. It's bad enough Dell took nearly 3 weeks to get the thing to me, and now this. I am weary and frustrated. Every other device in my home connects and STAYS connected, so the problem isn't on my end. Do I need to send this thing back? I certainly hope not.
BRAND NEW Inspiron 7000 WiFi is Horrendous!!