I have installed Windows 7 from scratch on dozens of computers. This includes early betas, the RC and the final release. For the first time I did an upgrade from Vista to Windows 7. The upgrade went perfectly. My desktop appeared fully intact. I was however unable to connect to the Internet. My network was working perfectly. After much research I found out that Apple was the culprit. Apple uses a program called Bonjour in its iTunes and QuickTime applications. It is also installed with Adobe Photoshop. In most cases you cannot uninstall Bonjour on its own. What needs to be done to stop the program involves stopping it within the Services. Here are the very simple steps to resolve this problem.
1. Open up task manager would control, alt, del keys.
2. Click the services tab.
3. On the bottom right of the screen you will see a services button, click.
4. You’re looking for ##Id_String2.6844F930_1628_4223_B5CC_5BB94B879762##.
5. Right click it and choose properties.
6. Under startup type choose disable.
7. Close all the windows and restart your computer.
8. You will now have your Internet connection.