When you start a Windows Vista-based computer, the system may stop responding (hang) at a black screen.

Additionally, you may experience the following symptoms when you try to recover from this problem:

• If you restart the computer, press F8 before the Windows Vista progress indicator appears, and then click the Safe Mode option, the same problem occurs.
• If you start Windows Recovery Environment (WinRE) to restore the Windows Vista-based computer, WinRE stops responding.
• If you try to use Windows Vista installation media to repair the system, the system stops responding.

Consider the following scenario:

• You install a Bluetooth device on a Windows Vista-based computer.
• You use the Bluetooth switch to turn the device off and on.
• You open Device Manager and look for the Bluetooth device.

In this scenario, the Bluetooth device may not appear in Device Manager. Then, when you try to shut down the computer, the computer stops responding (hangs).

When you start Windows Vista for the first time, the operating system appears to stop responding (hang) for several minutes during the device installation phase. After this wait, Windows starts as usual.

When you try to start Windows Live Photo Gallery, the program stops responding or will not start.

Consider the following scenario:

• You use a computer that is running Windows Vista Ultimate or Windows Vista Home Premium.
• The system is configured to use a digital cable tuner.
• You watch Live TV in Windows Media Center.
• You put the computer into hibernation or into sleep, and then you resume the computer.

In this scenario, Windows Media Center may stop responding (hang). Or, Windows Media Center cannot find the OpenCable Unidirectional Cable Receiver (OCUR) tuner. In some scenarios, you can watch TV again if you press the Live TV button several times. In other scenarios, you must restart the computer to watch TV.

Consider the following scenario:

• You are using a Windows Vista-based computer.
• You have Aero Glass disabled, or the video card does not support this mode.
• You are playing a video in Microsoft Windows Media Player.
• You are playing the video in full-screen mode.
• You right-click the full-screen video to display a shortcut menu.

In this scenario, the video playback window becomes unresponsive. If you press CTL+ALT+DEL to exit full-screen mode, Windows Media Player functionality returns.

When you start a Windows Vista-based computer that has a USB camera connected, the computer may stop responding. This problem may also occur when you perform an unattended installation of Windows Vista on a computer that has a USB camera connected. This problem occurs if the camera uses the Stream.sys driver.

After you log on to a Windows Vista-based computer for the first time, the computer may become very slow and unresponsive. Or, the computer may stop responding (hang).

Consider the following scenario. You develop a Windows Filtering Platform (WFP) driver. You install the WFP driver on a Windows Vista-based computer. In this scenario, some applications and services appear to stop responding for 15 seconds when a Domain Name System (DNS) lookup occurs. This problem occurs if the applications or the services use the DNS function.

The information in this article applies to the following configuration(s):

• Lost Planet
• Radeonâ„¢ HD2900 XT
• Windows Vista 32-bit Edition
• Windows Vista 64-bit Edition

Symptoms:
Setting AA to either 4x or 8x may result in the game failing to respond