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ITsVISTA KB-Link: KB975246

A memory leak occurs when you plug in and then unplug a USB camera from a computer that is running Windows Vista or Windows Server 2008

Consider the following scenario:

  • You connect a universal serial bus (USB) camera to a computer that is running Windows Vista or Windows Server 2008.
  • You plug in and then unplug the USB camera from the computer several times.

In this scenario, system performance is slow.

If you use the Driver Verifier (Verifier.exe) tool to verify the USB camera driver (Usbcamd2.sys), the computer crashes when you unplug the camera. Additionally, you receive the following Stop error message:

*** Fatal System Error: 0x000000C4 (parameter1, parameter2, parameter3, parameter4) DRIVER_VERIFIER_DETECTED_VIOLATION

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB975246.

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