Microsoft KB Archive/945360

= A USB 2.0 device that is attached to a USB 2.0 hub may stop working correctly in Windows Vista =

Article ID: 945360

Article Last Modified on 12/6/2007

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APPLIES TO


 * Windows Vista Enterprise 64-bit Edition
 * Windows Vista Home Basic 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Business
 * Windows Vista Business 64-bit Edition
 * Windows Vista Enterprise
 * Windows Vista Home Basic
 * Windows Vista Home Premium
 * Windows Vista Ultimate

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SYMPTOMS
Consider the following scenario:
 * You are using a Windows Vista-based computer.
 * You connect a USB 2.0 device, such as a Bluetooth adapter, to an external USB 2.0 hub.
 * The external USB hub is attached to a USB 2.0-capable port.

In this scenario, if you plug another USB 2.0 device into any other USB 2.0 port on the computer, and then you remove it, the device that is attached to the external USB 2.0 hub may stop functioning. Or, the device that is attached to the external USB 2.0 hub may not start.

Note An example of another USB 2.0 device is a USB 2.0 memory key.

Note This problem occurs whether the USB rollup package for Windows Vista is installed or not. For more information about the USB rollup package for Windows Vista, click the following article number to view the article in the Microsoft Knowledge Base:

941600 Cumulative update rollup for USB core components in Windows Vista



WORKAROUND
To work around this problem, disconnect and reconnect the USB 2.0 external hub. When you do this, the device will function correctly again.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Keywords: kbtshoot kbprb KB945360

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