On a Windows Vista-based computer, consider the following scenario:

• You use Wi-Fi Protected Access (WPA) together with Advanced Encryption Standard (AES) encryption to access wireless networks.
• A computer certificate is configured correctly on the computer.
• The computer has the correct permissions to access wireless networks.

In this scenario, you can see that a wireless network is available in the Connect to a network dialog box in the Network and Sharing Center. However, you cannot connect to the wireless network.