Windows Vista SP1 Causing Internet Connection Problems

Disable IPv6 on Windows Vista SP1

Option 1:

1. Click on the Start Menu.
2. Click on Control Panel.
3. Once the Control Panel is open, click the Classic View link on the left sidebar.
4. Find and double-click Network and Sharing Center.
5. Click Manage Network Connections on the left sidebar.
6. Find your Broadband connection (usually named Local Area Connection) and right-click on it.
7. On the context-menu, click Properties.
8. Click the Networking tab.
9. Remove the checkmark from Internet Protocol Version 6 (TCP/IPv6).
10. Click Ok.
11. Close all the windows opened in the previous steps.
12. Restart your computer.

Option 2 (requires modifying the registry but allows you to change one setting to affect all network adapters):

1. Microsoft Knowledge Base Article - KB929852 - How to disable certain Internet Protocol version 6 (IPv6) components in Windows Vista

Known Issues with disabling IPv6:

1. Any programs that require IPv6 will not work. One example is Windows Meeting Space:

Hopefully Microsoft gets this issue fixed soon as I hate workarounds, especially ones that make compromises. Though we all know that workarounds are a necessity of the digital life.

Source:site