"0x000000D1" error in Srv2.sys on a server that's running Windows Server 2008 R2 Service Pack 1

Applies to: Windows Server 2008 R2 Service Pack 1Windows Server 2008 R2 DatacenterWindows Server 2008 R2 Enterprise More

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A server that's running Windows Server 2008 R2 Service Pack 1 (SP1) crashes randomly in the Srv2.sys file process, and you receive a Stop error message that resembles the following:

0x000000D1 (parameter1, parameter2, parameter3, parameter4)

  • This Stop error describes a DRIVER_IRQL_NOT_LESS_OR_EQUAL issue.
  • The parameters in this error message vary, depending on the configuration of the server.
  • Not all "0x000000D1" errors are caused by this issue.


This issue occurs because of a race condition in the Srv2.sys process.


Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


You must have Windows Server 2008 R2 Service Pack 1 installed to apply this hotfix. For information about how to obtain a Windows Server 2008 R2 service pack, see Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2 .

Restart information

You have to restart the server after you apply this hotfix.

Replacement information

This hotfix does not replace any previously released hotfix.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

For more information about software update terminology, see Standard terminology that's used to describe Microsoft software updates .