My wireless finder did not find any network. My ethernet connect stop working... My internet stoped working. Somewhere I got a sugguestion - reinstalling Vista. That was the last thing I want to do. After going a few hours going through different services, components, etc. in Vista I could not find anything wrong. Even going back to a good system default a few days ago did not help. I had to go online on a different computer and found the solution from this link http://social.technet.microsoft.com/Forums/en/itprovistasecurity/thread/f4ce24aa-ae9d-4927-8b0f-52f3ddc4fbd9:

Open cmd - command prompt with administrative rights and run this "netsh winsock reset" then restart the computer and so far everything seem to work. Thanks to internet community. I remember over ten years ago when we had to find solution like this without the internet. We have come a long way. Another ten years and the internet resources continue to grow at this pace, I wonder how our lives are going to change for the better...