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ITsVISTA KB-Link: KB2410682

Function of USB Composite Device fails to start if not first function on device

USB Composite Devices consist of multiple Functions (functional devices) within a single USB device package.

Some USB function drivers (drivers which support USB functional devices) may work correctly for single-function USB devices, but may not correctly support functional devices within a USB Composite Device. The affected USB function will be marked in Device Manager with a Code 10 error(CM_PROB_FAILED_START).

This problem does not occur with similar USB devices using the same USB function drivers, when the device is configured as a single-function (not Composite) device.

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2410682.

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