After you repeatedly connect and disconnect a USB device to a computer that is running Windows Vista or Windows Server 2008, the USB device is not detected
Consider the following scenario:
- You connect a USB 2.0 high-speed device to a USB port on a computer that is running Windows Vista or Windows Server 2008.
- The device is successfully detected by the computer.
- You repeatedly disconnect the device from the computer and then connect the device to the computer.
In this scenario, the port no longer works and the device is not detected by the computer.
This problem occurs when the USB selective suspend setting is enabled in the Power Options dialog box.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB975163.