OK, so I checked my network adapters, I have two listed ...
Broadcom 440x 10/100 Integrated Controller and
Intel Wireless WiFi Link 4965AGN
When I checked them the status reads The device is working properly for each one. The Roll Back feature was not available to me, it was grayed out. By delete, I assume you mean uninstall, but I did not do that. I'm willing to try that but I thought some additional information might be helpful first.
Directly below the Network Adapters on the Device Manger I have listed:
Other devices
Unknown device
I'm not sure if that matters.
Also, I tried to reset TCP/IP protocol as described in the link provided by Flavius and when it typed in netsh int reset c:\resetlog.txt at the c prompt, I get
Requesting, Echo Request, Failed
The requested operation requires elevation
Requesting Global, Failed
The requested operation requires elevation
Requesting Interface, Failed
The requested operation requires elevation
There's no user specified settings to be reset
What I did succeed in doing is restoring my system via the rstrui command back to last night's settings, but I still received a "Found new hardware" window with a message stating that Windows needs to install driver software for your unknown device when I restart. And still no internet.