On Windows 7 sometimes it will show 2 network connections but you will not have internet access :-
- Local Area Connection or Wireless Network
- An extra Unidentified Network
When this happens there is no internet access
To temporary solve without restarting you can do this:-
- Network and Sharing
- Change Adapters
- Right Click on your usual Connection
- Click Disable
- Wait until it shows it is Disabled
- Right Click again and select Enable
This should resolve the problem
However, to permanently fix the issue:
Click Start
CMD
right click on cmd_exe
Click Run as Administrator
type route delete 0.0.0.0
press enter/return
type exit
Restart your computer