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ITsVISTA KB-Link: KB976529

Stop error message after you install a WFP callout driver in Windows Vista SP2 or in Windows Server 2008 SP2: “STOP: 0x0000000A”

You have a computer that is running Windows Vista Service Pack 2 (SP2) or Windows Server 2008 SP2. You install a third-party Windows Filtering Platform (WFP) callout driver. In this situation, you may receive a Stop error message on a blue screen. The Stop error message resembles the following:

STOP: 0x0000000A (parameter1, parameter2, parameter3, parameter4) IRQL_NOT_LESS_OR_EQUAL


  • The four parameters in the Stop error message may vary, depending on the configuration of the computer.
  • Not all “Stop 0x0000000A” error messages are caused by this problem.
  • WFP callout drivers are usually used in third-party antivirus and firewall programs.
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 KB976529.

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