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ITsVISTA KB-Link: KB974201

Stop error message when you retrieve WMI connection statistics for iSCSI after you change the iSCSI configurations on a computer that is running Windows Server 2008 or Windows Vista: “0×00000019 BAD_POOL_HEADER”

On a computer that is running Windows Server 2008 or Windows Vista, you may receive the following Stop error message:

0×00000019 (00000021, parameter2, parameter3, parameter4)

This behavior occurs when you change the Internet SCSI (iSCSI) configurations on the computer and retrieve some iSCSI connection statistics by using Windows Management Instrumentation(WMI).


  • The parameters in this error message vary, depending on the configuration of the computer.
  • Not all “0×00000019″ Stop errors are caused by this problem.
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 KB974201.

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